Question

please answer it,thanks in advance

Answer 1

avg speed = total dist/total time

43 = 215/t

t = 215/43 = 5 hr.

now at speed of 50 kmph , dist = 75km

so time taken = 75/50 = 1.5 hr.

reamining time = 5-1.5= 3.5 hr

remaining distance = 215-75= 140km

speed for remainig 140 km = 140/3.5 = 40 km/hr