Question

what is the height of a cylinder if its volume is 21cm² and radius is 3 cm​

Answer 1

${\huge{\rm{\underline{\underline{Question:}}}}}$

What is the height of a cylinder, if its volume is $\sf{21cm^3}$ and radius is 3 cm

${\huge{\rm{\underline{\underline{Solution:}}}}}$

$\star\;\underline{\boxed{\sf{\pink{Volume\ of\ Cylinder\ =\ \bf{\pi r^2h}}}}}$

πr²h = 21

9πh = 21

$\bf{9h = \cfrac{21 \times 7}{22}}$

$\bf{h = \cfrac{21 \times 7}{22 \times 9}}$

$\bf \: h \approx \: 0.74$

Answer 2

Answer:

✿Answer:

✰$\;\large{\boxed{\bf{\pink{Volume \:of \:cylinder=πr²h}}}}$

πr²h = 21

9πh = 21

$\bf{9h = \cfrac{21 \times 7}{22}}$

$\bf{h = \cfrac{21 \times 7}{22 \times 9}}$

$\bf \: h \approx \: 0.74h$