Question

A car covers 30 km in 30 minutes and next 30 km in 40 minutes . calculate the average speed for entire journey. ​

Answer 1

Explanation:

As given, the total time taken is 30 min +40 min =40 min =70 min , and the total distance traversed is 30 km +30 km =60 km . The average speed is

$\pmb{ \color{darkcyan} \tt\[ v _{ av }=\dfrac{60 km }{70 min }=\dfrac{60 km }{(70 / 60) h }=\dfrac{3600}{70} km / h \approx 51.4 km / h \]}$

Answer 2

As given, the total time taken is 30 min +40 min =40 min =70 min , and the total distance traversed is 30 km +30 km =60 km . The average speed is