A man rows 10 km/h in still water. If the river current tracks at 2 km/h, it takes him 2.5 hours to row to a point and back. How far is the point? MCQ with Answer and Explanation

A man rows 10 km/h in still water. If the river current tracks at 2 km/h, it takes him 2.5 hours to row to a point and back. How far is the point?
A. 10 km
B. 12 km
C. 15 km
D. 14 km
Answer: Option B
Solution (By JKSSB Mock Tests)
Downstream speed = 10 + 2 = 12 km/h. Upstream speed = 10 - 2 = 8 km/h. Let distance be d. d / 12 + d / 8 = 2.5 => 5d / 24 = 2.5 => 5d = 60 => d = 12 km.

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Practice More Time Speed and Distance Questions

Question #1
Two trains 100 meters and 120 meters long are running in the same direction at speeds of 72 km/h and 54 km/h respectively. In how much time will the faster train cross the slower train completely?
A. 44 seconds
B. 36 seconds
C. 40 seconds
D. 48 seconds

Correct Answer: Option A


Explanation:
Total distance = 100 + 120 = 220 meters. Relative speed = 72 - 54 = 18 km/h = 5 m/s. Time taken = 220 / 5 = 44 seconds.

This question belongs to: Maths Time Speed and Distance
Question #2
A train passes a pedestrian standing on a platform in 8 seconds and passes the platform itself, which is 200 meters long, in 18 seconds. Find the speed of the train in km/h.
A. 80 km/h
B. 64 km/h
C. 84 km/h
D. 72 km/h

Correct Answer: Option D


Explanation:
Time taken to cross the platform alone = 18 - 8 = 10 seconds. Speed of train = 200 / 10 = 20 m/s. In km/h = 20 * (18/5) = 72 km/h.

This question belongs to: Maths Time Speed and Distance
Question #3
A swimmer can traverse 36 km downstream in 3 hours and covers 12 km upstream in 3 hours. Find the swimmer's baseline speed in still water.
A. 7 km/h
B. 10 km/h
C. 8 km/h
D. 9 km/h

Correct Answer: Option C


Explanation:
Downstream speed = 36 / 3 = 12 km/h. Upstream speed = 12 / 3 = 4 km/h. Speed in still water = (12 + 4) / 2 = 16 / 2 = 8 km/h.

This question belongs to: Maths Time Speed and Distance