177 25 Marks
Rajesh is working out the area of a circle with radius 10.
He writes:
Area = 3.142 x 20
Explain why Rajesh’s working is wrong.
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Question
177 25 Marks
Rajesh is working out the area of a circle with radius 10.
He writes:
Area = 3.142 x 20
Explain why Rajesh’s working is wrong.
You must be logged in to post a comment.
Answer:
Rajesh did πr2 (π × r × 2) instead of πr². The correct work would be
Area = 3.142 x 10² so… Area = 3.142 x 100 not 3.142 x 20.