Car travels from stop it stop B with a speed of 30 km per hour and then returns back to a with speed of 50 km per hour find the average speed of the car
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total distance travelled by car =50+30=80=average speed = total distance travelled/total time taken= 80km/2 hour. answer the average speed of a car is 40km
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Explanation:
Let x = 30km/h
let y = 50km/h
Average speed of a car = (2xy)/x + y
= ( 2 × 30 × 50 ) ÷ 30 + 50
= 3000/80
= 37.5km/hr
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