A man can row 5 km/h in still water. He takes 2.5 hours to row to a point and back when the current flows at 1 km/h. How far is the point? MCQ with Answer and Explanation

Question

A man can row 5 km/h in still water. He takes 2.5 hours to row to a point and back when the current flows at 1 km/h. How far is the point?

A. 5.5 km

B. 6.0 km

C. 7.0 km

D. 6.5 km

Answer: Option B

Solution (By JKExamLibrary)

Downstream speed = 5 + 1 = 6 km/h. Upstream speed = 5 - 1 = 4 km/h. Let distance be d. d / 6 + d / 4 = 2.5 => 5d / 12 = 2.5 => 5d = 30 => d = 6 km.

This question belongs to: Maths Time Speed and Distance

Request complete Subject PDF

Discuss this Question (0)

No comments yet. Be the first to start the discussion!

Practice More Time Speed and Distance Questions

Question #1

Share Report

A boat can row 14 km/h in still water and the speed of the current is 2 km/h. Find the time taken to row 36 km upstream.

A. 4.0 hours

B. 2.5 hours

C. 3.0 hours

D. 3.5 hours

View Answer & Solution Discuss

Get Complete Subject PDF for Maths

Correct Answer: Option C

Explanation:
Upstream speed = 14 - 2 = 12 km/h. Time taken = 36 / 12 = 3 hours.

This question belongs to: Maths Time Speed and Distance

Question #2

Share Report

A man rows a distance of 12 km downstream in 1.5 hours and returns upstream in 3 hours. Find the speed of the river current.

A. 2.2 km/h

B. 2.5 km/h

C. 2.0 km/h

D. 1.8 km/h

View Answer & Solution Discuss

Get Complete Subject PDF for Maths

Correct Answer: Option C

Explanation:
Downstream speed = 12 / 1.5 = 8 km/h. Upstream speed = 12 / 3 = 4 km/h. Speed of current = (8 - 4) / 2 = 4 / 2 = 2 km/h.

This question belongs to: Maths Time Speed and Distance

Question #3

Share Report

A person rows 18 km downstream in 2 hours and covers the same distance upstream in 6 hours. What is the speed of the boat in still water?

A. 8 km/h

B. 5 km/h

C. 7 km/h

D. 6 km/h

View Answer & Solution Discuss

Get Complete Subject PDF for Maths

Correct Answer: Option D

Explanation:
Downstream speed = 18 / 2 = 9 km/h. Upstream speed = 18 / 6 = 3 km/h. Speed in still water = (9 + 3) / 2 = 6 km/h.

This question belongs to: Maths Time Speed and Distance

Explore All Time Speed and Distance MCQs