Question

Exercise 15.4

Find the circumference of the following circles (use it = =).
b) Radius = 35 cm
c) Radius = 49 cm.

a) Radius = 28 cm

please solve it
and give me a right answer

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Answer 1

Answer

2× pie ×r this is correct answer

219.8

307.72

175.84

This is answer.

Answer 2

Answer:

$b) \: r = 35cm \\ circumference = 2\pi \: r \\ = 2 \times \frac{22}{7} \times 35 \\ = 2 \times 22 \times 5 \\ = 220cm \\ \\ \\ c) \: r = 49cm \\ circumference = 2\pi \: r \\ = 2 \times \frac{22}{7} \times 49\\ = 2 \times 22 \times 7\\ = 308cm \\ \\ \\ d) \: r = 28cm \\ circumference = 2\pi \: r \\ = 2 \times \frac{22}{7} \times 28\\ = 2 \times 22 \times 4 \\ = 176cm$