Length, breadth, height increased 10%, 20%, 50%. % increase in volume: MCQ with Answer and Explanation

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Length, breadth, height increased 10%, 20%, 50%. % increase in volume:

A. 80%

B. 98%

C. 90%

D. 100%

Answer: Option B

Solution (By JKSSB Mock Tests)

1.1×1.2×1.5 = 1.98, increase 98%.

This question belongs to: Maths Percentage

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Question #1

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A train 250 m long passes a man running at 5 kmph in the same direction in which the train is going, in 10 seconds. Find the speed of the train.

A. 95 kmph

B. 90 kmph

C. 80 kmph

D. 85 kmph

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Correct Answer: Option A

Explanation:
Relative speed = (250/10) m/s = 25 m/s = 90 kmph. Speed of train = relative speed + man's speed = 90 + 5 = 95 kmph. (Man running same direction, so train overtakes, relative speed = train speed - man speed). So train speed = 25 m/s + 5 kmph? 25 m/s = 90 kmph, man 5 kmph, so train 95 kmph. Yes.

This question belongs to: Maths Percentage