A motorboat covers 16 km downstream in 1 hour and covers the same distance upstream in 2 hours. Find the speed of the boat in still water. MCQ with Answer and Explanation

A motorboat covers 16 km downstream in 1 hour and covers the same distance upstream in 2 hours. Find the speed of the boat in still water.
A. 12 km/h
B. 10 km/h
C. 15 km/h
D. 14 km/h
Answer: Option A
Solution (By JKSSB Mock Tests)
Downstream speed = 16 / 1 = 16 km/h. Upstream speed = 16 / 2 = 8 km/h. Speed in still water = (16 + 8) / 2 = 12 km/h.

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Practice More Time Speed and Distance Questions

Question #1
Walking at 3/4 of his normal speed, a person is 10 minutes late to his destination. What is his normal time?
A. 25 minutes
B. 40 minutes
C. 30 minutes
D. 35 minutes

Correct Answer: Option C


Explanation:
New speed = 3/4 of normal speed => New time = 4/3 of normal time. Difference = 1/3 of normal time = 10 minutes. Normal time = 10 * 3 = 30 minutes.

This question belongs to: Maths Time Speed and Distance
Question #2
A train 150 meters long passing a platform 250 meters long takes 20 seconds. Find the speed of the train in km/h.
A. 72 km/h
B. 80 km/h
C. 84 km/h
D. 64 km/h

Correct Answer: Option A


Explanation:
Total distance = 150 + 250 = 400 meters. Speed = 400 / 20 = 20 m/s. In km/h = 20 * (18/5) = 72 km/h.

This question belongs to: Maths Time Speed and Distance
Question #3
A train 160 meters long completely passes a static pole in 8 seconds. Find its speed in km/h.
A. 72 km/h
B. 84 km/h
C. 64 km/h
D. 80 km/h

Correct Answer: Option A


Explanation:
Speed = 160 / 8 = 20 m/s. In km/h = 20 * (18/5) = 72 km/h.

This question belongs to: Maths Time Speed and Distance