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A right angled triangle whose sides are ...

A right angled triangle whose sides are 3 cm, 4 cm and 5 cm is revolved around the longest side> Find the surface area of figure obtained. `(use pi=22/7)`

Text Solution

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`CSA=pirl`
`costheta=4/5`
`cos(90-theta)=r/4`
`sintheta=r/4`
`3/5=r/4`
`r=12/5`
CSA of cone 1 +CSA of cone 2
`pirl_1+pirl_2`
...
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