If the radius of cylinder is doubled, but height is reduced by 50% . What is the percentage change in volume ?

If the radius of a cylinder is doubled and the beight is reduced by 50% , then by how much percent does the volume increase/decrease?

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?

The radius of a cylinder is increased by 150% and its height is increased by 50%. What is the percentage increase in its volume? एक बेलन की त्रिज्या 150% बढ़ा दी जाती है और इसकी ऊंचाई में 50% की वृद्धि कर दी जाती है | इसके आयतन में कितने प्रतिशत की वृद्धि होगी ?

If the radius of sphere is reduced by 10%, then what will be the percentage change in its total surface area?

If the length of a rectangular field is doubled and its breadth is halved (i.e, reduced by 50% ) . What is percentage change in its area ?