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If the radius of a cylinder is decreased...

If the radius of a cylinder is decreased by 20% and the height is increased by 20% to form a new cylinder then the volume will be decreased by:
यदि किसी सिलेंडर की त्रिज्या 20% तक कम हो जाती है और उसकी ऊँचाई 20% तक बढ़ जाती है तो नए सिलिंडर की आयतन में कितनी कमी होगी

A

`20.5% `

B

`32.2%`

C

`23.2%`

D

`22.3%`

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