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 ?
✅ Correct Answer: (B)
12 km/hr
Explanation: Average = ( 2uv / u +v ) km/hr
= ( 2 x 15 x 10 ) / (15 +10 ) km/hr.
= 12 km/hr.
= ( 2 x 15 x 10 ) / (15 +10 ) km/hr.
= 12 km/hr.
Explanation by: Ruchi Sharma
Average = ( 2uv / u +v ) km/hr
= ( 2 x 15 x 10 ) / (15 +10 ) km/hr.
= 12 km/hr.
= ( 2 x 15 x 10 ) / (15 +10 ) km/hr.
= 12 km/hr.