177 25 Marks Rajesh is working out the area of a circle with radius 10. He writes: Area = 3.142 x 20 Explain why Raj

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.

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Thái Dương 4 years 2021-08-17T15:32:38+00:00 1 Answers 134 views 0

Answers ( )

  1. thienthanh
    0
    2021-08-17T15:34:09+00:00
    Reply

    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.

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