Question

Q5. The radius of a circular region is 7 m. Find its perimeter and area.
Q6. The perimeter of a circular plate is 132 cm. Find its area.​

Answer 1

Answer:

5) perimeter=2πr=2×22×7/7m=44m

area=πr^2=22×7×7/7sq m=154 sq m

6)2πr=132

=> r=132/2π=132×7/2×22cm=21 cm

are a=πr^2=22×21×21/7sq m=1386 sq cm