Question

Express each of the following.

(a) 84 km/h in m/s
(b) 15 m/s in km/h
(c) ⅔ km/min in km/h
(d) 120 cm/s in m/s

plz answer this with solving

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Answer 1

1. 1km = 1000 m,

1hr = 60×60 = 3600 sec

84000m/3600sec = 840/36 m/s

2)15 m/s

1m = 1/ 1000 km

1 sec = 1/3600

15/1000 = 15× 10^-3 km

1 sec = 1/3600 hr

15×10^-3× 3600 km/hr

3) 2/3 km/min

1min = 1/60 hr

2/3×60 km/hr

4)120 cm/s

1cm = 1/100 m

120/100 = 1.2 m

1.2 m/s