Login/Sign Up
Home » Find the perimeter and area from (i) Radius of circle (ii) Radius of circle
Find the perimeter and area from (i) Radius of circle =2.8cm(ii) Radius of circle =10.5cm
Class 10 | Frank | Guides | ICSE | Maths | Mensuration I
Find the perimeter and area from (i) Radius of circle =2.8cm(ii) Radius of circle =10.5cm

(i)

According to given question,

Radius of circle, r=2.8cm

Perimeter of the circle =2\pi r

=2\times \frac{22}{7}\times \left( 2.8 \right)

=17.6cm

Area of the circle =\pi {{r}^{2}}

=\frac{22}{7}\times {{\left( 2.8 \right)}^{2}}

=22.64c{{m}^{2}}

(ii)

According to given question,

Radius of circle, r=10.5cm

perimeter of the circle =2\pi r

=2\times \frac{22}{7}\times \left( 10.5 \right)

=66cm

Area of the circle =\pi {{r}^{2}}

=\left( 22/7 \right)\times {{\left( 10.5 \right)}^{2}}

346.5c{{m}^{2}}

i

More Material