Question

2. Find the area of a circle whose diameter is:
(i) 10.5 cm
(ii) 7 m
(iii) 1.75 km​

Answer 1

Answer:

area of circle=πr²

r is the radius , therefore d= 2r

r=d/2 = 7m/2 = 3.5

area of circle= π (3.5)²

similarly you can solve this

Answer 2

Answer:

Step-by-step explanation:

1) Given diameter of a circle is d=10.5 m

As we know that

Circumference of a circle with diameter d is πd

⟹ Circumference of a circle is  

7

22×10.5=33 m

2)the formula of area of a circle is πr^2 so,

given= d=7

r=d/2 =7/2

= πr^2 = π× (7/2)^2 = 38.48

3)area of circle= πd

so area of circle 22/7 *1.75= 5.5km