Question

A car moves at a speed that allows it to move 45 yards in 5⁄4 of a second. How long will it take a car at the same speed to move 80 yards? Write your answer as a fraction of a second.

Answer 1

The answer is that 80 yards can be covered in 222 seconds

Answer 2

First, to make things easier, let's turn 5/4 into a decimal given a second is equal to 1000 milliseconds.

5/4 = 1,25

1,25 * 1000 = 1250 milliseconds = 1.25 seconds

So, we've found that 45 yards can be covered in 1.25 seconds. Now we'll use the rule of 3:

45 - 1.25

80 - x

Now we solve:

(80 * 1.25) / 45 = x

100 / 45 = x

2,22... = x

So, according to our answer, 80 yards can be covered in 2,22 seconds, which in fractions would be:

$2,22 =\frac{222}{100} = \frac{111}{50}$

Hope it helped,

BioTeacher101