A train 150 m long crosses a pole in 10 seconds. What is its speed in kmph? MCQ with Answer and Explanation

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A train 150 m long crosses a pole in 10 seconds. What is its speed in kmph?

A. 60 kmph

B. 36 kmph

C. 45 kmph

D. 54 kmph

Answer: Option D

Solution (By JKSSB Mock Tests)

Speed = 150/10 = 15 m/s = 15 × 18/5 = 54 kmph.

This question belongs to: Maths Percentage

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Question #1

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Length of rectangle increased by 20%, breadth decreased by 15%. Percentage change in area:

A. 2% decrease

B. 2% increase

C. 3% decrease

D. 3% increase

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Correct Answer: Option B

Explanation:
1.2 × 0.85 = 1.02, 2% increase.

This question belongs to: Maths Percentage

Question #2

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65% of a number is 21 less than 80%. Number is:

A. 140

B. 150

C. 130

D. 120

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Correct Answer: Option A

Explanation:
0.8x - 0.65x = 21 → 0.15x = 21 → x = 140.

This question belongs to: Maths Percentage

Question #3

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A man spends 70% of his income. If his income increases by 20% and his expenditure increases by 10%, what is the percentage increase in his savings?

A. 13.33%

B. 43.33%

C. 45%

D. 10%

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Correct Answer: Option B

Explanation:
Let income = 100, expenditure = 70, savings = 30. New income = 120. New expenditure = 77. New savings = 120 - 77 = 43. Increase in savings = 43 - 30 = 13. Percentage increase = (13 / 30) * 100% = 43.33%.

This question belongs to: Maths Percentage

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