Question

Ram travel certain distance 3 km/h and reach minutes late when he travel 4 km/hr and reach 15 minutes earlier find the distance??

Answer 1

let the distance be x
let the time be t
t=d/s
case 1. t1=d/3
case 2. t2=d/4
t1-t2=15/60
15/60=d/3-d/4
15/60=d/12
d=15*12/60
d=15/5
d=3km