What is the speed of the car?

Question

It takes 5 minutes to start and 5 minutes to take out from garage plus 20 minutes to complete marketing job and 5 minutes to keep back in garrage. One way market is 10 K.M. (star pl)

Answer 1

are u lookign ofr average spped

the info we need to do tis is speed  = distance/time

  work out total time

put it into equation  

Answer 2

between 40 and 55

Answer 3

The speed of the car is exactly 60km/hr because taking out of the garage does'nt include in the journey nor starting .only the time taken to travel will be counted in this case.the formula is speed=distance/time.so putting the values convert 20minutes into hours because minutes are given and we have to calculate in km/hr.so the time will be20/60hours cutting it we get 1/3 hours and then apply the formula    s=d/t

=20/1/3=20*3=60km/hr