Question

5
1. The radii of two circles are 19 cm and 9 cm respectively.
Find the radius of the circle which has circumference equal
to the sum of the circumferences of the two circles.​

Answer 1

Answer:

28

Step-by-step explanation:

$circumference \: of \: 1st \: circle = 2\pi \times 19 \\ = 38\pi \\ circumference \: of \: 2nd \: circle = 2\pi \times 9 \\ = 18\pi \\ total \: circumference = 38\pi + 18\pi = 56\pi \\ = 56 \times \frac{22}{7} \\ = 176 \\ circumference = 2\pi \: \times r \\ 176 = 2\pi \times r \\ r = 28$

Answer 2

Answer:

this is your ans

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