Question

A cubical cistern can contains $729$ litres. Find the area of its base.

Answer 1

cubical cistern means every side are equal.

$L=S$ cm

$B=S$ cm

$H=S$ cm

Volume of Cistern$=S\times S\times S=729000{cm}^3$

$\Rightarrow S^3=729000$

$\Rightarrow S=90$ cm

side of base $=S$

Area of base (Square) $=S\times S=90\times 90=8100$sq.cm