Class 10, Quadratic Equations | If a student had walked 1 km /h faster, he would have taken 15 minut

Class 10, Quadratic Equations | If a student had walked 1 km /h faster, he would have taken 15 minut

Quadratic Equations
Chapter - 4 Class 10

If A student had walked 1 km /h faster, he would have taken 15 minutes less to walk 3 km. Find the speed at which he was walking.