Question

A car moves with a speed of 40km/h for 15 minutes, then with a speed of 60km/h for 15 minutes then with a speed of 48km/h for 10 minutes then with the speed of 30km/h for 20 minutes . Find the average speed of the car.

(A) 42km/h
(B) 43km/h
(C) 45km/h
(D) 47km/h

Give the answer with full explanation

Answer 1

$average speed = \frac{v1 + v2 + v3 + .... + vn}{n}$
= 318/4 = 79.5kmph

Answer 2

Answer: 43 km/hr

Step-by-step explanation:

The image attached below shall provide the answer.

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