A man rows upstream 14 km and downstream 26 km, taking 4 hours each time. Find the speed of the current. MCQ with Answer and Explanation

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A man rows upstream 14 km and downstream 26 km, taking 4 hours each time. Find the speed of the current.

A. 1.50 km/h

B. 2.00 km/h

C. 1.25 km/h

D. 1.75 km/h

Answer: Option A

Solution (By JKSSB Mock Tests)

Upstream speed = 14 / 4 = 3.5 km/h. Downstream speed = 26 / 4 = 6.5 km/h. Speed of current = (Downstream speed - Upstream speed) / 2 = (6.5 - 3.5) / 2 = 3 / 2 = 1.5 km/h.

This question belongs to: Maths Time Speed and Distance

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Question #1

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Walking at 5/6 of his baseline speed, an officer reaches his desk 12 minutes late. What is his baseline typical time?

A. 65 minutes

B. 70 minutes

C. 60 minutes

D. 55 minutes

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Correct Answer: Option C

Explanation:
New speed = 5/6 of usual speed => New time = 6/5 of usual time. Difference = 1/5 of usual time = 12 minutes. Typical baseline time = 12 * 5 = 60 minutes.

This question belongs to: Maths Time Speed and Distance