Average speed for round trip at 40 km/h going and 60 km/h returning? MCQ with Answer and Explanation

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Average speed for round trip at 40 km/h going and 60 km/h returning?

A. 50 km/h

B. 45 km/h

C. 48 km/h

D. 55 km/h

Answer: Option C

Solution (By JKSSB Mock Tests)

2*40*60/(40+60)=48 km/h.

This question belongs to: Maths Average

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Question #1

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Average of 12 numbers 670. If average of 8 is 665, average of remaining 4?

A. 678

B. 675

C. 682

D. 680

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Correct Answer: Option D

Explanation:
Sum12=8040. Sum8=5320. Remaining=2720. Average=680.

This question belongs to: Maths Average

Question #2

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The average of 4 consecutive odd numbers is 32. What is the smallest number?

A. 27

B. 33

C. 29

D. 31

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Correct Answer: Option C

Explanation:
Numbers are 29,31,33,35. Their average is 32. Smallest number = 29.

This question belongs to: Maths Average

Question #3

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Average age of class of 40 is 15. If teacher 40 included, new average?

A. 16

B. 15.6

C. 17

D. 15.5

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Correct Answer: Option A

Explanation:
Total=600. New total=640. /41≈15.61 approx 16.

This question belongs to: Maths Average

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