Question

convert 20 cm s^-1 into ms^-1 and km s^-1

Answer 1

20 cm = 0.2 m
therefore,

20cm s^-1 = 0.2m s^-1

0.2m = 0.2 × 10^-3 km

20cm s^-1 = 0.0002 km s^-1