Question

a mam takes X hours to travel y kilometre if his speed is doubled then find the time taken to cover the same distance​

Answer 1

Answer:

Suppose B takes t hours to walk d km.

Then, A takes (t + 2) hours to walk d km.

With double speed, A will take

2

1

(t+2) hours.

∴t−

2

1

(t+2)=1⇒2t−(t+2)=2⇒t=4

∴ B takes 4 hours to walk d km.