Question

Rachel mows 5 lawns in 8 hours.At this rate,how many lawns can she mow in 40 hours?

Answer 1

25

Explanation:

lawns : hours

5 : 8

X : 40

X = (8/5) × 40

= 25

Answer 2

25 lawns

Explanation:

To solve this problem, we will follow the steps below:

using proportion to solve this problem

Let x be the number of lawn she can mow in 40 hours

5 lawns = 8 hours

x = 40 hours

cross-multiply

8×x = 40×5

8x = 200

Divide both-side of the equation by 8

`(8x)/(8)` =
`(200)/(8)`

At the left-hand side of the equation 8 at the numerator will cancel-out 8 at the denominator, while at the right-hand side of the equation 200 will be divided by 8, thus;

x = 25 lawns

Therefore 25 lawns can be mow in 40 hours