What is 75% of 120? MCQ with Answer and Explanation
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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.
Correct Answer: Option B
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.
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.
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Percentage
Question #2
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If x is 50% of y, what percentage of x is y?
Correct Answer: Option B
Explanation:
x = 0.5y. Therefore, y = x / 0.5 = 2x. Thus, y is 200% of x.
x = 0.5y. Therefore, y = x / 0.5 = 2x. Thus, y is 200% of x.
This question belongs to:
Maths
Percentage
Question #3
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What percent of 80 is 20?
Correct Answer: Option A
Explanation:
(20/80) × 100 = 25%.
(20/80) × 100 = 25%.
This question belongs to:
Maths
Percentage
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