Question

Find area of a circle whose diameter is 10 cm.......

Answer 1

radius=diameter/2=10/2=5cm
area of circle=πr^2
so area=22/7*5*5
area=550/7=78.571428cm^2

Answer 2

Answer:

$\red {Area \: of \: a \: circle (A)}\green { = 78.57\:cm^{2} }$

Step-by-step explanation:

$Given \:diameter \:of \: the \: circle (d )=10\:cm$

$\boxed { \pink { Area \: of \: a \: circle (A)= \pi \left( \frac{d^{2}}{4}\right)}}$

$A = \frac{22}{7} \times \left( \frac{10^{2}}{4}\right) \\= \frac{22}{7} \times \frac{100}{4}\\= \frac{22\times 25}{7}\\= \frac{550}{7} \\= 78.57 \:cm^{2}$

Therefore.,

$\red {Area \: of \: a \: circle (A)}\green { = 78.57\:cm^{2} }$

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