Question

A car moves at a constant speed of 60 km/hr for 1 km and 40 km/hr for next 1 km.What is the average speed of the car?

Answer 1

Answer - The average speed of the car is 48 Km/hr

Explanation -

For 1st Km

Given - speed = 60 km/hr and distance = 1 km

Time = distance/speed = 1/60 Km/hr

For next 1 Km

Given - speed = 40 km/hr and distance = 1 km

Time = distance/speed = 1/40 Km/hr

Average Speed = Total Distance / Total Time

                         = (1 + 1) / (1/60 + 1/40)

                         = 2 * 2400/100

                         = 48 Km/hr

Answer - The average speed of the car is 48 Km/hr

Answer 2

Answer:

Explanation:

Solution:-

Given:-

For 1st Km

Speed = 60 km/hr

Distance = 1 km

Time = distance/speed = 1/60 Km/hr

For next 1 Km

Speed = 40 km/hr

Distance = 1 km

Time = distance/speed = 1/40 Km/hr

To Find :-

Average speed.

Formula to be used :-

Average Speed = Total Distance/Total Time

Average Speed = (1 + 1)/(1/60 + 1/40)

Average Speed = 2 * 2400/100

Average Speed = 48 Km/hr

Hence, the average speed of the car is 48 Km/hr.