Question

Area of acircle is 75.46 sq.m, find its diameter plz......

Answer 1

Area = πr²

75.46 = 22/7*r*r

r² = 24.01

r = √24.01

r = 4.9cm

d = 4.9+4.9

d = 9.8cm

Answer 2

$\underline\bold{\huge{SOLUTION \: :}}$

GIVEN, AREA OF THE CIRCLE = 75.46 m²

WE ALREADY KNOW THAT, TO DETERMINE THE AREA OF A SQUARE, WE USE THE FORMULA : $\pi {r}^{2} (where \: \pi = \frac{22}{7} \: and \: r \: is \: radius)$

So, πr² = 75.46

=> 22/7 × (r)² = 75.46

=> 22/7 × (r)² = 7546/100

=> r²/7 = 343/100

=> r²/7 = 3.43

=> r² = 24.01

=> r = 4.9

So, diameter of the circle

= (4.9 × 2) m

= 9.8 m [REQUIRED ANSWER]