Question

An umbrella has 8 ribs which are equally spaced. Assuming the umbrella to be a flat circle of radius 45 cm, find the area in $c{m}^2$ between the two consecutive ribs of the umbrella. $Take\pi =\frac{22}{7}$

• A. 795.22
• B. $\frac{22275}{28}$
• C. 6364.28

Answer 1

Answer: (A), (B)

The correct options are
A 795.22
B $\frac{22275}{28}$

Radius = 45cm

8 ribs implies angle subtend between consecutive ribs
$=\frac{360}{8}={45}^{\circ }$ .

Area between consecutive ribs
$=\frac{45}{360}\times \pi \times {45}^2=795.22c{m}^2$