Question

please send me plse ok ​

Answer 1

Answer:

We know that ,

Circumference of a circle = 2 pie r (c)

also,

Area of a circle = pie r square. (A)

(a) 10.5

c = 2 × 22/7 ×10.5

= 66 cm

A = 22/ 7 × 10.5 × 10.5 = 346.5 cm sq.

(b). 4.2

c = 2 × 22/7 × 4.2

= 26.4 cm

A = 22 /7 × 4.2 × 4.2

= 55.44 cm square

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Answer 2

Answer:

as we know that the circumference of the circle is 2πr and area is π r^2then,

for (i) :-

circumference =2πr

=2×22/7×10.5

=66cm

area of a circle = π r^2

=22/7×10.5×10.5

=346.5cm sq.

for (ii) :-

circumference =2πr

=2×22/7×4.2

= 26.4cm

area of a circle=πr^2

=22/7×4.2×4.2

=55.44 cm sq.

I hope it will help you❤