the radius of the inner boundry of a plane circular ring is 14cm the area if the ring is 346.5 sq.cm. Find the radius of the outer boundry
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the inner boundary of the ring is 14 cm and the total area is 346.5 sqcm..
imagine that the outer radious is r cm
so,
according to the question..
π(r^2-196)=346.5
or, r^2-196=15.75×22
or, r^2=346.5-196
or, r^2=150.5
or, r=12.70 cm (approximately)
the inner boundary of the ring is 14 cm and the total area is 346.5 sqcm..
imagine that the outer radious is r cm
so,
according to the question..
π(r^2-196)=346.5
or, r^2-196=15.75×22
or, r^2=346.5-196
or, r^2=150.5
or, r=12.70 cm (approximately)
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