Question

a car covers the first half of the distance b/w 2 places at speed of 40 km/hr
and second half at 60km/hr

find average speed​

Answer 1

hope it works ✌️

please mark me as brainliest ❤️

Answer 2

let a = average speed for the trip

let d = half the distance

:

write a time equation, time = dist/speed

d/40 + d/60 = 2d/a

we don't need d, divide thru by d and you have

1/40 + 1/60 = 2/a

multiply by 120a to clear the denominators, results:

3a + 2a = 120(2)

5a = 240

a = 240/5

a = 48 km/hr