Arrange the following speeds in increasing order -10 m/s, 1 km/min, 18 km/h.

(a) 10 m s^-1 = 10 m s^-1  (already in m s^-1)

(b) 1 km min^-1 = {1\ km\over 1\ min}

= {1 \times 1000\ m\over60\ s}

= {100\ m\over 6\ s} = 16.67 m s^-1

Hence, 1 km min^-1 = 16.66 m s^-1

(c) 18 km h^-1 = {18\ km\over1\ h}

={18\times 1000\ m\over60 \times 60\ s}

= 5 m s^-1

Hence, 18km h^-1 = 5 m s^-1

18 km h^-1, 10 m s^-1, 1 km min^-1. Ans