A train 120 meters long passes a signal pole in 6 seconds. Find the time it takes to completely cross a platform 240 meters long. MCQ with Answer and Explanation

Question

A train 120 meters long passes a signal pole in 6 seconds. Find the time it takes to completely cross a platform 240 meters long.

A. 22 seconds

B. 18 seconds

C. 20 seconds

D. 16 seconds

Answer: Option B

Solution (By JKSSB Mock Tests)

Speed of train = 120 / 6 = 20 m/s. Total distance to pass platform = 120 + 240 = 360 meters. Time required = 360 / 20 = 18 seconds.

This question belongs to: Maths Time Speed and Distance

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Question #1

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A mechanic wheel tracks 3000 revolutions to bridge a course distance of 2640 meters. Find the radius size of the wheel.

A. 18 cm

B. 14 cm

C. 16 cm

D. 12 cm

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Correct Answer: Option B

Explanation:
Distance wrapped in 1 turn revolution = 2640 / 3000 = 0.88 meters = 88 cm. Circumference = 2 * (22/7) * r = 88 cm => (44/7) * r = 88 => r = 14 cm.

This question belongs to: Maths Time Speed and Distance

Question #2

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A train 150 meters long passes a static observer in 6 seconds. How long will it take to pass a platform 250 meters long?

A. 16 seconds

B. 18 seconds

C. 14 seconds

D. 20 seconds

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Correct Answer: Option A

Explanation:
Speed of train = 150 / 6 = 25 m/s. Total distance to pass platform = 150 + 250 = 400 meters. Time taken = 400 / 25 = 16 seconds.

This question belongs to: Maths Time Speed and Distance

Question #3

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A motorcycle travels from terminal A to B at 40 km/h and returns at 60 km/h. What is the average speed for the round journey?

A. 50 km/h

B. 48 km/h

C. 52 km/h

D. 46 km/h

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Correct Answer: Option B

Explanation:
Average Speed = 2xy / (x + y) = (2 * 40 * 60) / (40 + 60) = 4800 / 100 = 48 km/h.

This question belongs to: Maths Time Speed and Distance

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