Question

A toy car travels from A to B at a constant speed of 20 km/h and immediately returns to A at a constant speed v. If the average speed of the car is 24 km/h, then v is (1) 24 km/h (2) 28 km/h (3) 30 km/h (4) 32 km/h​

Answer 1

answer is in images please check it out

Answer 2

Answer:

(2)28km/h

20+v/2 = 24

20+v = 48

v= 48-20

v = 28