Question 10:
An umbrella has 8 ribs which are equally spaced (see figure). Assuming umbrella to be a flat circle of radius 45 cm, find the area between the two consecutive ribs of the umbrella. [Use π = 22/7]
Answer:
There are 8 ribs in an umbrella. The area between two consecutive ribs is subtending 360°/8 = 45° at the centre of the assumed flat circle.
Area between two consecutive ribs of circle
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