A slow jogger runs a mile in 13 minutes. calculate the speed in (a) in/s, (b) m/min, (c) km/h. (1 mi = 1609m; 1in=2.54cm)

Before starting the solution, let's first convert the units to the ones we need:

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:13 minutes = 13 / 60 = 0.2166 hours

= 13 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 / 13 min = 123.769 m/min

(c) km/hr

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