Question

2.
1. If the area of a plastic plate is 42.6 cm
then find its circumference.
The areas of two circles are in the ratio
16:49. Calculate the ratio of their
circumferences.
3. The circumference of a circle is 40 cm
more than its diameter. Calculate the
radius of the circle.
The diameter of a wheel of a motorcycle
is 60 cm. It moves slowly along a
cemented road. How far will it go in 34
complete revolutions?
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Answer 1

Answer:

Step-by-step explanation:

Area of plastic plate = 42.6 cm²

Since plastic plate is in the shape of circle

Let Radius of circle = r

π r²= 42.6

r²=→→→Take π=3.14

r= 3.6833

r= 3.684 cm

Circumference of circle = 2 π r

                  = 2 × 3.14 × 3.684→→→Take π=3.14

                  = 6.28 × 3.684

                   = 23.13552 cm

                   = 23.14 cm (Approx)

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