Question

when traveling between two towns,the time taken varies inversely with the average speed. when the average speed is 48kilometres per hour the time taken is three whole number one over four hours.find the time taken when the average speed is 65kilometres per hour.

Answer 1

time = k / speed

3/4 = k / 48
so
k = 48 * 3/4 = 12*3 = 36
then if speed = 65
k does not change = 36
t =36 / 65 = 0.554 hr