1)

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

2)

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

3)

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

4)

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