The speed of a boat in still water is 15 km/h and the speed of the current is 3 km/h. How much distance can the boat cover upstream in exactly 3 hours? MCQ with Answer and Explanation

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The speed of a boat in still water is 15 km/h and the speed of the current is 3 km/h. How much distance can the boat cover upstream in exactly 3 hours?

A. 40 km

B. 32 km

C. 36 km

D. 44 km

Answer: Option C

Solution (By JKExamLibrary)

Upstream speed = 15 - 3 = 12 km/h. Distance covered in 3 hours = Upstream Speed * Time = 12 * 3 = 36 km.

This question belongs to: Maths Time Speed and Distance

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Practice More Time Speed and Distance Questions

Question #1 Report Error

A private sedan tracks a sector path length of 480 km in 5 hours 20 minutes. Find its mean average speed index.

A. 85 km/h

B. 95 km/h

C. 100 km/h

D. 90 km/h

View Answer & Solution Discuss

Correct Answer: Option D

Explanation:
Time = 5 hours 20 minutes = 5 + 20/60 = 5.333 hours = 16/3 hours. Speed index = Sector Distance / Time = 480 / (16/3) = 480 * 3 / 16 = 30 * 3 = 90 km/h.

This question belongs to: Maths Time Speed and Distance

Question #2 Report Error

A commuter sets off from point M at 7 AM walking at 5 km/h. Another departs M at 9 AM in the same direction at 8 km/h. At what distance from M do they meet?

A. 26.66 km

B. 30 km

C. 24 km

D. 28 km

View Answer & Solution Discuss

Correct Answer: Option A

Explanation:
By 9 AM, the first commuter has walked for 2 hours, covering 5 * 2 = 10 km. Relative speed = 8 - 5 = 3 km/h. Time taken to meet = 10 / 3 hours. Distance from M = Speed of second commuter * Time = 8 * (10/3) = 80/3 = 26.66 km.

This question belongs to: Maths Time Speed and Distance