Question
An umbrella has 8 ribs which are equally spaced. Assuming the umbrella to be a flat circle of radius 42 cm, find the area in cm2 between the two consecutive ribs of the umbrella.
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Answer:
:
Radius= 42cm
8 ribs implies angle subtend between consecutive ribs = 3608 = 45∘ .
Area between consecutive ribs = θ360×π×(radius)2
45360× 227 ×422 = 693 cm2
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:
Radius= 42cm
8 ribs implies angle subtend between consecutive ribs = 3608 = 45∘ .
Area between consecutive ribs = θ360×π×(radius)2
45360× 227 ×422 = 693 cm2
Was this answer helpful ?
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