Answer: 40
Step-by-step explanation:
138/x = 207/60
8280 = 207x
divide by 207
40 = x
Answer:
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Step-by-step explanation:
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Question 7:
Diameter = 6.2 cm so Radius = 3.1 cm
A=πr² = 3.14 × 3.1² = 30.1754 cm² = 30.18 cm²
Question 8:
Circumference = 2πr
16π = 2πr
therefore 16 = 2r so r = 8cm