Question

a boy cover a distance of 25 km in 3 hours partly on food at the rate of 5 km per hour and partly on bicycle at the rate of 10 km per hour find the distance covered on foot

Answer 1

a man covers a distance of 25 km in 3 hours partly on foot at speed of 5 km per hour and partly on bicycle at speed of 10 km per hour.

Find the distance covered on foot.

x=3.5*t

25-x=9*(4-t)

25-3.5t=36-9t

5.5t=11

t=2

x=3.5*2=7km

(7 Km is the distance covered on foot)