Question 7 • Grade 7 Mathematics
Kylie’s circle has a radius of 4 cm because its diameter is 8 cm. Its area is 3.14 × 4² = 50.24 cm², while Paige’s area is 3.14 × 3² = 28.26 cm². The difference is 50.24 − 28.26 = 21.98 cm², which rounds to 22 cm², choice C.
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