Question

A typical marathon is 26.2 miles. Allan averages 12 kilometers per 1 hour when running in marathons. How long does it take for Allan to complete a marathon, to the nearest tenth of an hour.

Answer 1

3.5 hours

Explanation:

Given: Distance= 26.2 miles

Speed= 12 km/h

First lets convert the unit of speed from kmh to mph.

Remember, 1 mile= 1.609 km

∴ For speed of 12 km/h=
`(12)/(1.609)= 7.45\ mph`

Speed= 7.45 mph

Next, find time taken by Allan to complete a Marathon.

`Time= (Distance)/(speed)`

⇒ Time=
`(26.2)/(7.45)`

∴ Time= 3.516 hours ≅ 3.5 h (nearest tenth)

∴ Allan took 3.5 hours to complete marathon.