Question

a man covers a distance of 25 km in 4 hours partly on foot at the speed of 3.5 kilometre per hour and partly on cycle at 9 kilometre per hour find the distance covered on foot.​

Answer 1

Step-by-step explanation:

let distance by foot is Xkm in hr

by cycle

is 25-x km in 4-t hr

distance =s peed*time

x=3.5*t

25-x=9*(4-t)

25-3.5t=36-9t

5.5t=11

t=2

x=3.5*2=7km