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Smith travels along four sides of a squa...

Smith travels along four sides of a square at speeds of 10, 12, 15 and 20 km/hr. The average speed of the Smith is:

A

`13 (1)/(3)` km/hr

B

`12 (1)/(2)` km/hr

C

`14 (1)/(4)` km/ hr

D

10 km/hr

Text Solution

Verified by Experts

The correct Answer is:
A
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