Question

if the constant increase of its speed is done every 10 minutes, what will be the speed of his car for the first 30 minutes

Answer 1

39.0625

Explanation:

20 mph = 20 x 0.25 = 5 - constant increase, 10 mins. = 20 x 1.25 = 25 mph, 20 mins. = 20 x 1.25 x 1.25 = 31.25 mph, 30 mins. = 20 x 1.25 x1.25 x 1.25 = 39.0625 mph.