31)

A train travelling at the speed of x km/h crossed a 300 m long platform in 30 seconds, and overtook a man walking in the same direction at 6 km/h in 20 seconds. What is the value of x?

SSC CPO 2020

A)

102

B)

48

C)

60

D)

96

32)

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 y (in m) ?

SSC CPO 2020

A)

210

B)

200

C)

168

D)

252

33)

The speed of a boat in still water is 15 km/h, and the speed of the current is 5 km/h. In how much time (in hours) will the boat travel a distance of 60 km upstream and the same distance downstream?

SSC CPO 2020

A)

12

B)

10

C)

9

D)

20

34)

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?

SSC CGL 2022

A)

7

B)

8

C)

5

D)

6

35)

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\({1 \over 8} \) hours and 8 hours, respectively. If the speed of A is 32 km/h, then the speed, in km/h of B is:

SSC CGL 2022

A)

30

B)

28

C)

21

D)

25

36)

A boat can cover a distance of 56 km downstream in 3.5 hours. The ratio of the boat in still water and the speed of stream is 3 : 1. How much time (in hours) will the boat take to cover a distance of 41.6 km downstream?

SSC CGL 2022

A)

2.6

B)

1.8

C)

2.1

D)

1.5

37)

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:

SSC CGL 2022

A)

12.5

B)

25

C)

24

D)

12

38)

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?

SSC CGL 2022

A)

8

B)

6

C)

9

D)

7

39)

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?

SSC CGL 2022

A)

10

B)

5

C)

8

D)

6

40)

A 240-m long train crosses a 360-m long tunnel in 30 seconds. What is the speed of the train (in km/h)?

SSC CGL 2022

A)

72

B)

28.8

C)

43.2

D)

60