A rectangular lawn is 30 m long and 20 m wide…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
A rectangular lawn is long and wide. A round fountain with a diameter of stands in the lawn. Find the area of the grass. Take .
Need a reminder? The key ideaShow
Name the plain shapes. Add the pieces, or subtract the part that is cut away. Keep as a letter until the last step. The perimeter of a combined figure counts only its outer edge.
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Given. The lawn is by , and the fountain has a radius of .
Step 1. The lawn. .
Step 2. The fountain. .
Step 3. The grass. .
Answer: .
Check. The answer is smaller than the lawn, , as it should be.
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