Question

11. A man reaches his office 40 minutes late if he walks 3 km/h but 30 minutes early if he walks 4 km/h
his office is at a distance (in km).
(a) 12
(b) 15
(d) 84
(c) 14​

Answer 1

let x is time of office

x+40

x-30

3x+120=4x-120

x=240

x=4hour2/3

distance=14/3×3

14km