Walking at 8/9 of his normal speed, an analyst reaches his designated terminal 12 minutes late. Find his usual time to reach the terminal. MCQ with Answer and Explanation

Question

Walking at 8/9 of his normal speed, an analyst reaches his designated terminal 12 minutes late. Find his usual time to reach the terminal.

A. 104 minutes

B. 112 minutes

C. 96 minutes

D. 84 minutes

Answer: Option C

Solution (By JKSSB Mock Tests)

New speed = 8/9 of usual speed => New time = 9/8 of usual time. Difference = 1/8 of usual time = 12 minutes. Usual time = 12 * 8 = 96 minutes.

This question belongs to: Maths Time Speed and Distance

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Question #1

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A man can row 5 km/h in still water. He takes 2.5 hours to row to a point and back when the current flows at 1 km/h. How far is the point?

A. 7.0 km

B. 5.5 km

C. 6.0 km

D. 6.5 km

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Correct Answer: Option C

Explanation:
Downstream speed = 5 + 1 = 6 km/h. Upstream speed = 5 - 1 = 4 km/h. Let distance be d. d / 6 + d / 4 = 2.5 => 5d / 12 = 2.5 => 5d = 30 => d = 6 km.

This question belongs to: Maths Time Speed and Distance

Question #2

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A car ascends an incline path 24 km long at 6 km/h and maps the return path descent at 12 km/h. Find the net average speed for the round course.

A. 8.0 km/h

B. 7.2 km/h

C. 8.8 km/h

D. 9.6 km/h

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Correct Answer: Option A

Explanation:
Average Speed = 2xy / (x + y) = (2 * 6 * 12) / (6 + 12) = 144 / 18 = 8 km/h.

This question belongs to: Maths Time Speed and Distance

Question #3

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A man walks a certain distance at a speed of 4 km/h and runs back at 16 km/h. Find his average speed.

A. 9.6 km/h

B. 8 km/h

C. 6.4 km/h

D. 10 km/h

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Correct Answer: Option C

Explanation:
Average Speed = (2 * 4 * 16) / (4 + 16) = 128 / 20 = 6.4 km/h.

This question belongs to: Maths Time Speed and Distance

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