Question

A car covers a certain distance in 40 minutes, if it turns 54km/hr. How much time will it take to cover the same distance at a speed 45 km /hr?

Answer 1

t = 40mins = 2400s

v = 54Km\h = 15m\s

∴15 = d\2400

d = 36000m

Now,

If the speed is

v = 45Km\h = 12.5m\s

d = 3600

v = d\t

12.5 = 3600\t

t = 3600\12.5

t = 288s

t = 4.8 mins