Question

if a student had walked 1km/hr faster.he would have taken 15 minutes less to walk 3 km. find the rate at which he was walking.

Answer 1

3km/hr :)

3/x - 3/x+1 =15( in min so convert to hrs by dividing by 60)

this should be your equation 



best?

Answer 2

3kmph. He was walking 3kmph so if he walked 1kmph faster it wold have taken him 15min less