We should know the volume of bigger cube. .

First of all find the surface area of brick.

What about the length of river that flows into the sea per hour .

Try and apply the formula for the surface area of cuboid .

What do we mean when we ask to find the number of bricks required to complete the wall ?

Try and apply the formula for the surface area of cuboid .

The amount of water can be found out by finding the space inside the cubical box so that itsvolume.

The amount of water can be found out by finding the space inside the cubical box so that itsvolume.

Do you know that surface area is the total area on the surface ?

First of all find the surface area of a single box .