Answer: The number of lawns that could be mowed in 1 hour is 3 lawns.
Step-by-step explanation:
Define Ratios and proportions:
A ratio is the comparison between two different quantities while proportion is an equality of two ratios.
A ratio is an ordered pair of numbers a and b, written a / b where b does not equal 0. A proportion is an equation in which two ratios are set equal to each other.
Given data,
- 5 hours to mowed 15 lawns
Ratio of hours to lawns mowed
15 hours ⇒ 5 lawns
1 hour ⇒ X lawns
5 : 15 = 1:X
5/15 = 1/X
Cross multiply,
we can write,
5X= 15
X = 15/5
X = 3 lawns
Therefore,
rate of lawns mowed per hour = 3 lawns / 1 hour
= 3 lawns per hour.
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