Question

The ratio of surface area of two cube is 1:9 find the ratio of their volumes

Answer 1

$ratio \: of \: their \: volume \:$
$({1x})^{3} \div ({9x})^{3}$
$1 {x}^{3} \div 729 {x}^{3}$
$1\binom {.}{.} 729$
.... Hope you got it

Answer 2

ratio of their volumes=1:729