Question

If a boy walks from home to school with a speed 70kmph he is 20 minutes late if he walks with a speed 40kmph he is 5 minutes earlier find the distance from home to school

fast please ​

Answer 1

Explanation:

Let the distance between the school and the house is x km

Speed of the boy from house to school =20 km/hr.

Using formula, Time taken =speeddistance.

So, time taken =20x hours.

Also,Speed of the boy from school to the house =30 km/hr

So, time taken =30x hours.

Total time taken =20x+30x=12xhours

Also total distance covered by boy =x+x=2x km.

Using formula,

Average speed =TotaltimeTotaldistance=12x2x=24 km/hr.

Thus, average speed of the boy's journey is 24 km/hr.