Average speed for two equal times at 30 and 50 km/h? MCQ with Answer and Explanation

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Average speed for two equal times at 30 and 50 km/h?

A. 40 km/h

B. 45 km/h

C. 38 km/h

D. 42 km/h

Answer: Option A

Solution (By JKExamLibrary)

Arithmetic mean for equal time: (30+50)/2=40.

This question belongs to: Maths Average

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Question #1 Report Error

Average of 1 to 25 is

A. 13.5

B. 12.5

C. 13

D. 12

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Correct Answer: Option C

Explanation:
(25+1)/2=13.

This question belongs to: Maths Average

Question #2 Report Error

The average of 5 numbers is 34. If two numbers are 28 and 32, find the average of the remaining three.

A. 36.67

B. 36

C. 37

D. 35.33

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Correct Answer: Option A

Explanation:
Sum=5×34=170. Sum of two=28+32=60. Sum of three=110. Avg=110/3=36.67.

This question belongs to: Maths Average

Question #3 Report Error

Average of 12 numbers 75. If average of 7 is 70, average of remaining 5?

A. 85

B. 82

C. 78

D. 80

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Correct Answer: Option B

Explanation:
Sum12=900. Sum7=490. Remaining=410. Average=82.

This question belongs to: Maths Average

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