A slow jogger runs a mile in 18 minutes. Calculate the speed in: (a) in/s

(b) m/min

(c) km/h

1- For the distance:1 mile = 1609 meter

                                         = 1609 x 100 = 160900 cm

                                         = 1609 / 1000 = 1.609 km

                                         = (160900 x 1 ) / 2.54 = 63346.45 in

2- For the time:18 minutes = 18/ 60 = 0.2166 hours

                                           = 18 x 60 = 780 seconds

Now, let's start solving:

velocity is calculated using the following rule:

velocity = distance / time

(a) in/seconds

velocity =  63346.45 in / 780 sec = 81.213 in / sec

(b) m/min

velocity = 1609 m / 18 min = 123.769 m/min

(c) km/hr

velocity = 1.609 km / 0.2166 hr = 7.428 km/hr