find the area between 2 concentric circles with radii 7cm and 10.5 cm
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Answer:
hey mate !!!!!!!!!!!!
Step-by-step explanation:
area of the circle ( radius = 7cm ) = πr²
= 22/7 × 7 × 7
= 22 × 7
= 154cm²
area of the circle ( radius = 10.5cm ) = πr²
= 22/7 × 10.5 × 10.5
= 2425.5/7
= 346.5cm²
therefore area between these two circles = 346.5 - 154
= 192.5cm²
hope it's helpful ^_^
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