find the speed in min./sec. : distance= 60 km , time = 1 hr. 20 min.

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Solution

$Distance = 60 km = 60 \times 1000 m = 60000 m Time = 1 hr 20 \min = 80 \min = 80 \times 60 \sec = 4800 \sec Speed = \frac{distance}{time} = \frac{60000}{4800} = 12.5 m / s$

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find the speed in min./sec. : distance= 60 km , time = 1 hr. 20 min.

Distance = 60 km = 60×1000 m= 60000 mTime = 1 hr 20 min = 80 min = 80 × 60 sec = 4800 secSpeed = distancetime = 600004800 = 12.5 m/s

$Distance = 60 km = 60 \times 1000 m = 60000 m Time = 1 hr 20 \min = 80 \min = 80 \times 60 \sec = 4800 \sec Speed = \frac{distance}{time} = \frac{60000}{4800} = 12.5 m / s$