Question

a car takes 20 minutes to cover a distance pf 15 km find its speed​

Answer 1

Answer:

Speed in m/sec

1min = 60 seconds

20 min = 60 x 20 = 1200 sec

1km = 1000m

15 km = 15000 m

Speed = Distance /time

= 15000/1200

= 12.5 m/sec

Speed in km /hr

60 min = 1hr

20min = 20/60 = 0.33 hr

15 km

Speed = Distance /time

= 15km/0.33 hr

= 1500/33

= 45.45 km/hr

So, the speed of car is 12.5 m/sec

Answer 2

Step-by-step explanation:

Time taken by the car = 20 minutes = 20/60 hours = 1/3 hours

Distance covered by the car = 15km

→ Speed = distance/ time

             = 15/(1/3)

             = 45km/h

             = 45*(5/18) m/s

             = 12.5m/s