Question

(i) The speed of a car is 45 km/h. Find its speed in m/s.
(ii) Convert 10 m/s into km/h.
17
trnin run at 77 kmh What is its speed in m/min?
answer is I 12.5and ii 36
I want explain​

Answer 1

Answer:

18 km/h = 5 m/s

Step-by-step explanation:

(i)

Break down km/h

1 km = 1000 m

1 hr = 60 mins = 3600 sec. So 1 km/h = 1000/3600 m/sec. So 18 km/h = 5 m/s

45 km/h = (45 x 5) / 18 m/s = 25/2 m/s = 12.5 m/s

(ii)

18 km/h = 5 m/s. So

10 m/s = 36 km/h