Question

evaluate the area of a quadrant of circle whose circumference is 20 cm​

Answer 1

Answer:

Area of quadrant = 7.95 cm²

Step-by-step explanation:

Given that,

circumference of circle = 20 cm

=> 2πr = 20

=> 2 × 22/7 × r = 20

=> r = (20×7)/(2×22)

=> r = 140/44

=> r = 35/11

Now,

area of quadrant = 1/4 × πr²

=> Area of quadrant = 1/4 × 22/7 × 35/11 × 35/11

=> Area of quadrant = 7.95 cm²

Hence, area of quadrant whose circumference is 20 cm is 7.95 cm².

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