Question

a body travels a distance of 10 km with a constant speed of 30 kilometre per hour and the next 40 kilometre at constant speed of 50 kilometre per hour find the average speed for the whole journey ​

Answer 1

average speed is =

(speed of first instance+speed of second instance)/2

=(30+50)/2

=80/2

= 40 km/hr....(ans)

( pls. do not forget to follow and thanks)

Answer 2

90 km/h

average speed =total speed