21)

Sunil can row a boat 20 km upstream in 1 hour 15 minutes. If the speed of the current of the river is 2 km/h, then how much time will he take to row the boat 30 km downstream?

SSC CHSL 2021

A)

1 h 10 m

B)

1 h 30  m

C)

1 h 20 m

D)

1 h 45 m

22)

A boat can go 15 km downstream and 8 km upstream in 2 h. It can go 20 km downstream and 12 km upstream in 2 h 50 min. What is the speed (in km/h ) of the boat while going downstream?

SSC CHSL 2021

A)

15

B)

18

C)

20

D)

16

23)

A train, 500 m long, passes a railway platform 400 m long, in one minute with uniform speed. What is the time (in seconds) taken by the train to pass a man riding a motorbike, travelling opposite to the direction of the train, at a speed of 18 km/h?

SSC CHSL 2021

A)

54

B)

30

C)

48

D)

25

24)

Two trains start at the same time from two stations and proceed towards each other at speeds 88 km/h and 75 km/h, respectively. When they meet, it is found that one train has travelled 65 km more than the other. What is the distance(in km) between the two stations?

SSC Selection Post Matric 2022

A)

815

B)

875

C)

975

D)

960

25)

A 280 m long train is running at a speed of 54 kmph. In how much time (in seconds) will it cross a man moving at 12 kmph in the same direction as that of the train?

SSC Selection Post Matric 2022

A)

28

B)

20

C)

25

D)

24

26)

The speed of a boat in still water is 15 km/h and the speed of the stream is 3 km/h. How much time (in hours) will be boat take if it goes 36 km downstream?

SSC Selection Post Matric 2022

A)

1.5

B)

2

C)

2.5

D)

3

27)

How long (in seconds) will a train of a length 450 m, running at a speed of 69 km/h, take to cross a man moving in the opposite direction at a speed of 3 km/h?

SSC Selection Post Matric 2022

A)

22.5

B)

18.5

C)

20

D)

25

28)

The distance between two persons A and B is 432 km. They started travelling towards each other at 7 : 20 hours at 24.5 km/h and 20.5 km/h. respectively. At what time did they meet?

SSC Selection Post Matric 2022

A)

16:56 hours

B)

14:08 hours

C)

13:18 hours

D)

13:38 hours

29)

A 200 m long train crosses a pole in 10 seconds. Another train of length 250 m crosses a platform which is 200 m long in 15 seconds. If both trains move in opposite directions, how much time (in seconds) will they take to cross each other completely?

SSC Selection Post Matric 2022

A)

6

B)

10

C)

9

D)

8

30)

A train x running at 74 km/h crosses another train y running at 52 km/h in the opposite direction in 12 seconds. If the length of y is two-thirds that of x, then what is the length of x (in m)?

SSC CPO 2020

A)

200

B)

168

C)

210

D)

252