Question

Rob measures his go-cart’s speed to be 250 inches per second. What is the go-cart’s speed in miles per hour (to the nearest tenth) ?

A) 7.1 mph
B) 14.2 mph
C) 28.4 mph
D) 35.2 mph

Answer 1

b.14.2 mph

Explanation:

Answer 2

The cart’s speed in miles per hour is 14.2 miles per hour .

Option (B) is correct .

Explanation:

As given

Rob measures his go-cart’s speed to be 250 inches per second.

As

`1\ inch = (1)/(63360)\ miles`

`1\ second = (1)/(3600)\ hours`

Now convert 250 inches per second into miles per hour .

`250 inches\ per\ second = (250* (1)/(63360))/((1)/(3600))\ miles\ per\ hour`

`250 inches\ per\ second = ((250)/(63360))/((1)/(3600))\ miles\ per\ hour`

`250 inches\ per\ second = (250* 3600)/(63360)\ miles\ per\ hour`

`250 inches\ per\ second = (900000)/(63360)\ miles\ per\ hour`

250 inches per second = 14.2(Approx) miles per hour.

Therefore the cart’s speed in miles per hour is 14.2 miles per hour .

Option (B) is correct .