A man covers half of his journey at 6 km/h and the remaining half at 3 km/h. Find his average speed. MCQ with Answer and Explanation

Question

Share Report Error

A man covers half of his journey at 6 km/h and the remaining half at 3 km/h. Find his average speed.

A. 4.8 km/h

B. 4.5 km/h

C. 4 km/h

D. 5 km/h

Answer: Option C

Solution (By JKSSB Mock Tests)

Average Speed = 2xy / (x + y) = (2 * 6 * 3) / (6 + 3) = 36 / 9 = 4 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 locomotive running at 54 km/h takes 20 seconds to completely cross a platform. If it takes 8 seconds to pass a standing point observer, find the platform length.

A. 180 meters

B. 200 meters

C. 160 meters

D. 220 meters

View Answer & Solution Discuss

Get Complete Subject PDF for Maths

Correct Answer: Option A

Explanation:
Speed of train = 54 * (5/18) = 15 m/s. Length of train = Speed * Time to cross observer = 15 * 8 = 120 meters. Total distance to cross platform = Speed * Time = 15 * 20 = 300 meters. Platform length = 300 - 120 = 180 meters.

This question belongs to: Maths Time Speed and Distance

Question #2

Share Report

Two trains 140 meters and 160 meters long are tracking on parallel routes in opposite directions at 40 km/h and 50 km/h respectively. How long do they take to clear each other?

A. 12 seconds

B. 10 seconds

C. 14 seconds

D. 15 seconds

View Answer & Solution Discuss

Get Complete Subject PDF for Maths

Correct Answer: Option A

Explanation:
Total distance = 140 + 160 = 300 meters. Relative speed = 40 + 50 = 90 km/h = 90 * (5/18) = 25 m/s. Time taken = 300 / 25 = 12 seconds.

This question belongs to: Maths Time Speed and Distance