Question

Alfonso runs 10 km at an average speed of km/h. The next day he runs 12 km at an average speed of (x-1) km/h. The time taken for 10km run is 30 mins less than time taken for 12 km/h. Write an equation inx and simplify the answer to x^2-5x-20=0

Answer 1

By your equation the value of X comes to be 7.62

Means, speed on first day is 7.62km/hr &in second day is 6.62 km/hr