Question

A sphere has volume of 2146cm3 calculate it's (a) radius surface area

Answer 1

see as we know that volume of sphere is 4/3πr³

=2146 cm³

This means that

4/3*22/7*r³=2146

r³=2146*21/88

r³=512

This implies r=8 cm

Now it's surface area is 4πr²

=4*22/7*64

=804.57cm²

Pls mark it brainliest

Answer 2

$\huge {\bf{\red{\fbox{\underline{Hey\: Mate }}}}}$

$\huge {Here\: is \: your \: ans ....} [/tex ] GIVEN : VOLUME OF SPHERE : 2146cm^2 [tex]4 \div 3\pi \: {r}^{3} = 2146$

$4 \div 3 \times 22 \div 7 \: \times {r}^{3} = 2146$

${r}^{3} = 2146 \times 3 \div 4 \times 7 \div 22$

${r}^{3} = 512.11$

$r = 8$

(approx.)

SURFACE AREA OF SPHERE :

$= 4\pi {r}^{2}$

$= 4 \times 22 \div 7 \times 8 \times 8$

$= 804.57$

$\huge{ \bf{\red {\fbox {\underline {Hope\: it \: helps ..}}}}}$