A person walking at 4/5 of his usual speed reaches his shop 15 minutes late. What is his usual time to reach the shop? MCQ with Answer and Explanation

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A person walking at 4/5 of his usual speed reaches his shop 15 minutes late. What is his usual time to reach the shop?

A. 60 minutes

B. 80 minutes

C. 50 minutes

D. 70 minutes

Answer: Option A

Solution (By JKSSB Mock Tests)

New speed = 4/5 of usual speed => New time = 5/4 of usual time. Difference = 1/4 of usual time = 15 minutes. Usual time = 15 * 4 = 60 minutes.

This question belongs to: Maths Time Speed and Distance

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Question #1

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A train 260 meters long passes a roadside signal box in 13 seconds. How long will it take to pass a bridge 440 meters long?

A. 38 seconds

B. 40 seconds

C. 35 seconds

D. 32 seconds

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Correct Answer: Option C

Explanation:
Speed of train = 260 / 13 = 20 m/s. Total distance to cross the bridge = 260 + 440 = 700 meters. Time required = 700 / 20 = 35 seconds.

This question belongs to: Maths Time Speed and Distance

Question #2

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A man covers a distance of 24 km in 3 hours. If he doubles his speed, how much time will he take to cover a distance of 32 km?

A. 1 hour

B. 4 hours

C. 3 hours

D. 2 hours

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Correct Answer: Option D

Explanation:
Original speed = 24 / 3 = 8 km/h. Doubled speed = 16 km/h. Time required for 32 km = 32 / 16 = 2 hours.

This question belongs to: Maths Time Speed and Distance

Question #3

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A boat covers 40 km downstream in 4 hours and the same distance upstream in 8 hours. Find the speed of the stream.

A. 2.5 km/h

B. 3.5 km/h

C. 3.0 km/h

D. 2.0 km/h

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Correct Answer: Option A

Explanation:
Downstream speed = 40 / 4 = 10 km/h. Upstream speed = 40 / 8 = 5 km/h. Speed of stream = (10 - 5) / 2 = 5 / 2 = 2.5 km/h.

This question belongs to: Maths Time Speed and Distance

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