A person travels at the speed of 12 kmph, 14 kmph and 28 kmph on the surface of an equilateral triangular plane. Find her average speed? (in kmph)

A person travels at the speed of 12 kmph, 14 kmph and 28 kmph on the s

1.	A person travels at the speed of 12 kmph, 14 kmph and 28 kmph on the surface of an equilateral triangular plane. Find her average speed? (in kmph)
A.	15.95
B.	15.65
C.	15.75
D.	15.85
Answer» D. 15.85

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A person travels at the speed of 12 kmph, 14 kmph and 28 kmph on the surface of an equilateral triangular plane. Find her average speed? (in kmph)

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