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If the radius of a cylinder is doubled and the height is reduced by 50%, then the volume increases/decreases by what percent ?
यदि किसी बेलन (सिलिंडर) की त्रिज्या को दोगुना किया जाता है और ऊंचाई को 50% काम किया जाता है, तो आयतन में कितने प्रतिशत वृद्धि/गिरावट होती है?

A

100% increase/ वृद्धि

B

66.67% decrease/ कमी

C

75% increase/ वृद्धि

D

50% decrease/ कमी

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