A train 180 meters long is running at a speed of 90 km/h. How long will it take to pass a post? MCQ with Answer and Explanation

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A train 180 meters long is running at a speed of 90 km/h. How long will it take to pass a post?

A. 7.2 seconds

B. 8 seconds

C. 6 seconds

D. 9 seconds

Answer: Option A

Solution (By JKSSB Mock Tests)

Speed = 90 * (5/18) = 25 m/s. Time to pass a post = 180 / 25 = 7.2 seconds.

This question belongs to: Maths Time Speed and Distance

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Question #1

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A jogger covers a distance of 18 km in 2 hours. If he runs at 1.5 times his original speed, how much time will he take to cover a distance of 27 km?

A. 3 hours

B. 1.5 hours

C. 2 hours

D. 2.5 hours

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Correct Answer: Option C

Explanation:
Original speed = 18 / 2 = 9 km/h. New speed = 1.5 * 9 = 13.5 km/h. Time needed for 27 km = 27 / 13.5 = 2 hours.

This question belongs to: Maths Time Speed and Distance

Question #2

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A container ship routes a distance of 120 nautical miles at a speed of 15 knots (nautical miles per hour). Find the total time of the passage.

A. 8 hours

B. 6 hours

C. 10 hours

D. 12 hours

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Correct Answer: Option A

Explanation:
Time = Distance / Speed = 120 / 15 = 8 hours.

This question belongs to: Maths Time Speed and Distance

Question #3

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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. 5 km/h

C. 7 km/h

D. 8 km/h

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Correct Answer: Option A

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

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