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Submitted by zeinabm_2011 on Tue, 2012-01-17 19:35

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adi_ab on Sat, 12 May 2012

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# Initially, A yoga ball is partially blown up and its surface area measured. Afterwards, it is filled completely and its...

Initially, A yoga ball is partially blown up and its surface area measured. Afterwards, it is filled completely and its surface area is found to be 1.60 times as big as it was recorded earlier. By what factor has its volume changed?

By what percentage has the radius changed?

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xxx the xxxxxxx xxxxxx xx r m xxx the final radius be R xx

xxxxxxxxxxxxxxxxxxxxxxxx

(R/r)^2=1.6

xxxxxxxxxxx xxxxxxx 1.26419)

xxxxx volume=(4/3)(\pi)(R^3)=(4/3)(\pi)(2.02386r^3)=2.02386(4/3)(\pi)(r^3)=2.02386(initial volume)

The xxxxxx has xx xxxx xxxxx the xxxxxxxxx

xxxxxxxxxx change in xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

xxx xxxxxx xxx xxxxxxxxx xx xxxxxx