![The radius of a spherical balloon increases from 7 cm to 14 cm as air is being pumped into it. Find the ratio of surface areas of the balloon in the two cases The radius of a spherical balloon increases from 7 cm to 14 cm as air is being pumped into it. Find the ratio of surface areas of the balloon in the two cases](https://d138zd1ktt9iqe.cloudfront.net/media/seo_landing_files/ncert-solutions-class-9-maths-chapter-13-exercise-13-4-question-4-01-1623733826.png)
The radius of a spherical balloon increases from 7 cm to 14 cm as air is being pumped into it. Find the ratio of surface areas of the balloon in the two cases
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![Diameter of cylinder A is 7 cm, and the height is 14 cm. Diameter of cylinder B is 14 cm and height is 7 cm. Without doing any calculations can you suggest Diameter of cylinder A is 7 cm, and the height is 14 cm. Diameter of cylinder B is 14 cm and height is 7 cm. Without doing any calculations can you suggest](https://d138zd1ktt9iqe.cloudfront.net/media/seo_landing_files/2-1566804132.png)
Diameter of cylinder A is 7 cm, and the height is 14 cm. Diameter of cylinder B is 14 cm and height is 7 cm. Without doing any calculations can you suggest
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![Measuring tape ruler cm numbers 13 14. Measuring tape metal ruler showing measuement in centimeters (cm) numbers on plain | CanStock Measuring tape ruler cm numbers 13 14. Measuring tape metal ruler showing measuement in centimeters (cm) numbers on plain | CanStock](https://cdn.w600.comps.canstockphoto.com/measuring-tape-ruler-cm-numbers-13-14-pictures_csp32878385.jpg)