Question

if a=2 pi r square, solve for 'r' and find the value of r if a=77 and pi=22 by 7

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Answer 1

Answer:

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Answer 2

Answer:

a = 2πr²

given:

a= 77

π = 22/7

by putting the values

77 = 2×22/7 ×r²

77 = 44/7 ×r²

r² = 77×7/44

r² = 49/4

r = √49/4

r = √(7×7)/(2×2)

r = 7/2

r = 3.5