Question

A man walks at 6 km/h and runs at 8 km/h. He covers 6 km in 50 min partly by running and partly by walking, (1) For how long did he walk? (u) What distance did he cover walkin​

Answer 1

Answer:

Let him walk for x mt.=x/60 hr

Then he runs for 50-x mt. =(50-x)/60 hr. It is given

6×(x/60)+8×{(50-x)/60}=6

6x+8(50-x)=6×60=360

6x+400-8x=360

-2x=360-400=-40

x=20