A ship sails out to a mark at the rate of 15 kmph. and sails back at the rate of 10 kmph. The average rate of sailing is ? - 36723

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Ruchi Sharma • 9.84K Points
Tutor III Math

Q. A ship sails out to a mark at the rate of 15 kmph. and sails back at the rate of 10 kmph. The average rate of sailing is ?

(A) 5 km/hr

(B) 12 km/hr

(C) 12.5 km/hr

(D) 25 km/hr

Correct Answer - Option(B)

Explanation by: Ruchi Sharma

Average = ( 2uv / u +v ) km/hr
= ( 2 x 15 x 10 ) / (15 +10 ) km/hr.
= 12 km/hr.

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