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 m…

Question

asked Dec 8, 2019 140k views

2 Answers

Wesc · Answer 1 · 2019-12-13T10:32:11+0000

Answer:

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 .