Question

chapter 11 perimeter of area exercise 11.3 question 12 class7​

Answer 1

Answer:

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Step-by-step explanation:

The circumference of a circle is 31.4 cm. Find the radius and the area of the circle. (Take π = 3.14)

Solution:

Circumference of the circle = 31.4 cm

2πr = 31.4

∴ r=\frac{31.4}{2 \times 3.14} = 5cm

Area of the circle = 7πr2 = 3.14 × 5 × 5 = 78.5 cm2

Hence, the required radius = 5 cm and area = 78.5 cm2.