A car travels x km at 60 km/hour
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Explanation:
Given:
A car travels x km at 60km per hr and then travels another 2x km at 40km/hr.
To find:
The average speed for the entire distance.
Solution:
As we know that when an object is moving at a speed 's' and covers distance 'd' in time 't' then its speed is given by:
So,
As given,
The speed of the car when it travels x km = 60 Km/hr.
So, the time that is taken by the car to travel x km
Also,
the speed of the car when it travels 2x km = 40 Km/hr.
So, the time that is taken by the car to travel 2x km.
Hence,
the average speed for the entire distance.
On solving the above, we get
Hence, the average speed for the entire distance is 45 km/hr.
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