Time & Distance SSC CGL 2021 all Shift Questions
1) motorboat whose speed is 20 km/h in still water takes 30 minutes more to go 24 km upstream than to cover the same distance downstream. If the speed of the boat in still water is increased by 2 km/h, then how much time will it take to go 39 km downstream and 30 km upstream?
a)2h 40 m
b)3h 10m
c)3h 40m
d)2h 50m
ans : b
hint : assume water speed factors of 24 like 2, 4, 6, 8
2)A car runs first 275 km at an average speed of 50 km/h and the next 315 km at an average speed of 70 km/h. What is the average speed (in km/h) for the entire journey?
a)58.5
b)60
c)59
d)62
ans : c
hint : find total time then apply basic formula total distance by total time (or ) total distance is 590 so aprox answer by eliminating 59 or 58.5
3)A boatman can row his boat in still water at a speed of 9 km/h. He can also row 44 km downstream and 35 km upstream in 9 hours. How much time (in hours) will he take to row 33 km downstream and 28 km upstream?
a)7
b)5
c)6
d)8
ans : a
hint : down stream distance 44km factors are 11 , 4 so A+B either 11 or 4 same way 35 km factors are 7 , 5 which means A-B is either 7 or 5 put in equation and try
4)The ratio of the speeds of two trains is 2: 7. If the first train runs 250 km in 5 hours, then the sum of the speeds (in km/h) of both the trains is:
a)250
b)175
c)150
d)225
ans : d
hint : find speed of first train then put in speed ratio 2p is 50 then 11 p ?
5)A and B started their journeys from X to Y and Y to X. respectively. After crossing each other, A and B completed remaining parts of their journeys in 6 1/8 hours and 8 hours, respectively. If the speed of A is 32 km/h, then the speed in km/h of B
a)21
b)28
c)30
d)25
ans :b
hint: apply formula square root of t1 / t2 = s2 /s1
6)A journey of 900 km is completed in 11 h. If two-fifth of the journey is completed at the speed of 60 km/h. at what speed (in km/h) is the remaining journey completed?
a)108
b)72
c)84
d)90
ans : a
hint : find 2/5th distance time then rest time you will get find by using that
7)A train covers a distance of 225 km in 2 1 /2 hours with a uniform speed. The time taken, in hours, to cover a distance of 450 km with the same speed is:
a)5
b)4
c)3
d)6
ans:a
hint : easy question basic formula
8)A train covers a distance of 225 km in 2 1/2 hours at a uniform speed. The time taken by the train (in hours) to cover a distance of 630 km at the same speed is:
a)5
b)7
c)6
d)4
ans : b
9)A person travels 5x distance at a speed of 5 km/h, x distance at a speed of 5 km/h, and 4x distance at a speed of 6 km/h, and takes a total of 112 minutes. What is the total distance (in km) travelled by the person?
a)8
b)10
c)9
d)12
ans: b
hint : assume x is 5 km then total 10 x means 50km for 50 km 560 min time you will get . then for 112 min 10 km
10)Shyam drives his car 30 km at a speed of 45 km/h and, for the next 1 h 20 m. he drives it at a speed of 51 km/h. Find his average speed (in km/h) for the entire journey.
a)49
b)48
c)48.5
d)47
ans: a
hint : find total distance and total time apply the formula
11)A railway engine passes two bridges of lengths 400 m and 235 m in 100 seconds and 60 seconds, respectively. Twice the length of the railway engine (in m) is:
a)24
b)25
c)12.5
d)12
ans : b
hint : speed is same so equate speed formula or for 165m 40 sec so speed is 165/40
12)Anup can row 33 km downstream and 35 km upstream in 8 hours. He can also row 44 km downstream and 28 km upstream in the same time. How much time (in hours) will he take to row 55 km downstream and 14 km upstream?
a)9
b)6
c)8
d)7
ans :d
hint : take down stream km 33 , 44 factors 11 , 3 ,4 as A+B , down stream 35 km , 28 km factors 7 ,5 , 4 as A-B put in equations as trail and error
13)A takes 3 hours more than B to walk ‘d’ km. If A doubles his speed, then he can make it in 1 hour less than B. How much time (in hours) does A require to walk ‘d’ km?
- a) 5
- b) 9
- c) 8
- d) 4
ans : c
hint : if he double the speed then his time becomes half B TIME t and A time (t+3)/2 difference is 1 hour
14)A car covers a distance of 90 km in 50 min. What is its speed (in m/s)?
a)60
b)90
c)108
d)30
ans : d
15)Ram travelled from a place Z to P at an average speed of 130 km/h. He travelled the first 75% of the distance in two third of the time and the rest at an average speed of X km/h. The value of X/2 is:
a)51
b)48.75
c)97.5
d)19.25
ans : b
hint : distance ration 3:1 time ratio 2 : 1 so 4 parts distance in 3 parts time so 4/3 x value 130
16)Akhil rides first 12 km at a speed of 16 km/h and further 6 km at a speed of 20 km/h. Find his average speed (in km/h)
a)18 1/5
b)17 1/7
c)17 1/2
d)16 4/5
ans : b
17)If Raman drives his bike at a speed of 24 km/h, he reaches his office 5 minutes late. If he drives at a speed of 30 km/h, he reaches his office 4 minutes early. How much time (in minutes) will he take to reach his office at a speed of 27 km/h?
a)45
b)55
c)40
d)50
ans : 40
hint : take speed ration inverse to speed with that help find distance
18)The distance between two towns is covered in 7 hours at a speed of 50 km/h. By how much should the speed ( km/h) be increased so that 2 hours of travelling time will be saved ?
a) 70
b) 20
c)40
d)30
ans : b
19) The distance between two stations A and B is 200 km. A train runs from A to B at a speed of 75 km/h, while another train runs from B to A at a speed of 85 km/h. What will be the distance between the two trains (in km) 3 minutes before they meet?
a)5
b)8
c)10
d)6
ans : b
hint : basic relative speed in opposite direction (75+85 ) 3/60
20)Two trains are running on parallel tracks in the same direction at the speed of 80 km/h and 90 km/h, respectively. The trains crossed each other in 3 minutes. If the length of one train is 230 m, then what is the length (in m) of the other train?
a)270
b)230
c)250
d)300
ans : a
21) 240-m long train crosses a 360-m long tunnel in 30 seconds. What is the speed of the train (in km/h)?
a)72
b)43.2
c)60
d)28.8
ans : 72
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