Question

A car travels from A to B at a speed of 20 km h-' and
returns at a speed of 30 km h! The average speed of
the car for the whole journey is
(A) 5 kmh
(B) 24 kmh-
(C) 25 kmh
(D) 50 km h-​

Answer 1

Answer:

b)24km/h

Explanation:

average speed =tot.distance /tot time

speed¹=20km/h speed²=30km/h

time¹=distance /20 time²=distance/30km/h

average speed =tot.distance /tot time

=2d

d +d

20 30

=2d ×12

d

=24km/h

b)24km/h

hope it helps