Question

A person traveled a distance of 200km between two cities by car covering the first half distance of journey at constant speed of 40km/h and the remaining half distance at a constant speed of vkm/h . If the average speed during the entire journey is 48km/h ,find the value of v?

Answer 1

Answer:60km/hr

Explanation:

Vavg = (L1+L2+........+Ln)/(L1/V1+L2/V2+........+Ln/Vn)

48=200/(100/40+100/v)

48(2.5+100/v)=200

4800/v=200-120=80

v=4800/80=60