1. Find the area, circumference, and diameter of the circles whose radius is 15cm. use pi = 22/7
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Answer:
Area = π r²
= 22/7 × 225
= 707.14 cm²
Circumference = 2πr
= 2×22/7 × 15
= 94.28 = 94.30 cm
Diameter = 2r
= 2 × 15 = 30 cm
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