Question

If a cubical water tank is 90 cm tall. Find the volume of tank.

Answer 1

Step-by-step explanation:

Given:

For a cube,

Side =90 cm

To find:

Surface area and volume of the cube

Explanation:

\sf side,a=90cmside,a=90cm

We know that

\boxed{\sf volume \: of \: cube=a^3 \: cubic\: units }volumeofcube=a3cubicunits

\begin{gathered} \longrightarrow \: \sf \: v = {a}^{3} \\ \\ \longrightarrow \: \sf v = {90}^{3} \\ \\ \longrightarrow \: \boxed{\sf v = 729000 \: {cm}^{3} }\end{gathered}⟶v=a3⟶v=903⟶v=729000cm3

\boxed{\sf T.S.A=6a^2}T.S.A=6a2

putting in the values

\begin{gathered}\longrightarrow \: \sf T.S.A=6(90)^2 \\ \\ \longrightarrow \: \sf T.S.A=6(8100) \\ \\ \longrightarrow \: \boxed{ \sf T.S.A=48600 {cm}^2}\end{gathered}⟶T.S.A=6(90)2⟶T.S.A=6(8100)⟶T.S.A=48600cm2

Extra information:

↔L.S.A of cube=4a² sq.units

↔L.S.A of cuboid =2h(l+b) sq.units

↔T.S.A of cuboid =2(lb+bh+lh) sq.units

↔Volume of cuboid=lbh cubic units

Answer 2

Answer:

Volume of tank = 729000cm³

Given

• side of cubical tank = 90 cm

Step-by-step explanation:

We know that the volume of cube = s³

Volume of cubical tank = (90cm)³ = 729000cm³