Question

Twenty seven solid iron spheres, each of radius r and surface area S are

melted to form a sphere with surface area S′. Find the

(i) radius r ′ of the new sphere,

(ii) ratio of S and S′.​

Answer 1

Answer:

if p(m = M3+ 2m²-m+

10+2m²-mt 10 then

cas + p(-a)=2

Answer 2

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$\large \pink{Question:-}$

Twenty seven solid iron sphere , each of radius "r" and surface area "s" are melted to form a sphere with surface area "s" find the ....

➊ radius r' of the new sphere ,

$\large\blue{Answer:- }$

$\red\rightarrow27 \times \frac{4}{3} \times \pi \times r^{2} = \frac{4}{3} \times \pi \times r^{2}$

$\pink\rightarrow3 \sqrt{27r^{3} } = r ^{3}$

$\orange\rightarrow3r \: = r......(1)$

➋ ratio of S and S' .

$\large\red{Answer:- }$

$\blue \rightarrow\frac{sa1}{sa2} = \frac{4\pi \: r^{2} }{4\pi \: r^{2} } = \frac{4\pi \: r^{2} }{4\pi \times (3r)^{2} }$

$\green \rightarrow \: \frac{r}{9r^{2} } = \: 1 : 9 \: \: \:$

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