Question

(1) A man runs at a speed of 12 km/h. How long will he take to cover a distance of 8 km?
(1) The speed of a car is 45 km/h. Find its speed in m/s.
(ii) Convert 10 m/s into km/h.​

Answer 1

Answer:

12km in 1 hour

so 1 km in 60 min / 12

1 km in 5 min

8 km in 5×8 min

8 km in 40 minutes

45×1000/ 60×60

45×10/6×6

450/36=225/18=75/6=25/2=12.5 m/s

10m/s=10×3600/1000= 36 km / h