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Question

Find the area of a circle whose diameter is $$1.4\,m$$.


Solution

Given, Diameter of a circle $$= 1.4 \,m$$
So, radius of the circle $$r = \dfrac{1.4} {2}\ m = 0.7 \,m$$

Then,
Area of the circle $$= \pi r^2$$ sq units
                              $$= \dfrac{22}{7} \times 0.7 \times 0.7\ m^2$$
                              $$= 22 \times 0.1 \times 0.7\ m^2$$
                              $$= 1.54 \,m^2$$

Hence, the area of the circle is $$ 1.54 \,m^2$$

Mathematics

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