Reshma covers 45 km at a speed of 15 km/h by bicycle, 80 km at a speed of 40 km/h by car, and another 6 km at a speed of 2 km/h on foot. Find her average speed for the whole journey (correct to 2 decimal places).
Show answer & explanation
Correct answer: A
Explanation
The correct answer is Option 1 i.e. 16.38 km/h
According to the question
The average speed = Total distance/total time
= (45 + 80 + 6)/(3 + 2 + 3) = 131/8 = 16.38 km/h