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? MCQ with Answer and Explanation

Question

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. 6 km/h

B. 7 km/h

C. 5 km/h

D. 8 km/h

Answer: Option A

Solution (By JKExamLibrary)

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

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 passenger train 140 meters long passes an active bridge platform 310 meters long in 20 seconds. What is the speed of the train in km/h?

A. 90 km/h

B. 81 km/h

C. 75 km/h

D. 85 km/h

View Answer & Solution Discuss

Get Complete Subject PDF for Maths

Correct Answer: Option B

Explanation:
Total distance = 140 + 310 = 450 meters. Speed = 450 / 20 = 22.5 m/s. In km/h = 22.5 * (18/5) = 4.5 * 18 = 81 km/h.

This question belongs to: Maths Time Speed and Distance

Question #2

Share Report

A commercial truck handles a sector distance path of 480 km in 8 hours. How much time will it require to cover a path length of 300 km if it moves at the same speed?

A. 4.5 hours

B. 5.0 hours

C. 5.5 hours

D. 6.0 hours

View Answer & Solution Discuss

Get Complete Subject PDF for Maths

Correct Answer: Option B

Explanation:
Speed of truck = 480 / 8 = 60 km/h. Time required for 300 km path = 300 / 60 = 5 hours.

This question belongs to: Maths Time Speed and Distance

Question #3

Share Report

A person row a boat 45 km downstream in 3 hours and manages the return journey upstream in 9 hours. Find the speed of the river current.

A. 5.5 km/h

B. 6.0 km/h

C. 5.0 km/h

D. 4.5 km/h

View Answer & Solution Discuss

Get Complete Subject PDF for Maths

Correct Answer: Option C

Explanation:
Downstream speed = 45 / 3 = 15 km/h. Upstream speed = 45 / 9 = 5 km/h. Speed of current = (15 - 5) / 2 = 10 / 2 = 5 km/h.

This question belongs to: Maths Time Speed and Distance

Explore All Time Speed and Distance MCQs