Question

A man on tour travels first 160 km at 64 km/hr and the next 160 km at 80 km/hr. The
average speed for the first 320 km of the tour is
​

Answer 1

Answer:

hope it will help u

Step-by-step explanation:

In 1st case-

speed=64km/hr

distance=160km

so,time=160/64=2.5 hrs

In 2nd case-

distance=160km

speed=80km

so,time=160/80=40/21hrs

now,average speed =total distance by total time taken so,total distance=320km and total time= 40/21hrs+2.5hrs

average speed=320km/40/21hr+2.5hr=72.64km/hr