Area of Irregular Objects

Q.

Describe the stepwise method to find the area of a leaf using a graph paper.

Q.

The area of a rectangle is $117m^2$. Its width is $9m$. Calculate its length.

Q. The length of a rectangle is $10cm$ and breadth is $7cm$. What will be the area of a rectangle formed by joining $12$ of these rectangles?

1. $840c{m}^2$
2. $840cm$
3. $84c{m}^2$
4. $440c{m}^2$

Q. A room is $5m40cm$ long and $3m75cm$ wide. What area of carpet is needed to cover the floor?

1. $20.25m^2$
2. $20.52m^2$
3. $20.15m^2$
4. $20.51m^2$

Q. Three cubes whose edges are $3cm,4cmand5cm$ respectively are melted to form a single cube. Find the volume of the new cube.

1. $210c{m}^3$
2. $213c{m}^3$
3. $216c{m}^3$
4. $224c{m}^3$

Q.

A metal cube of edge $\mathbf{12}\mathbf{}\mathit{c}\mathit{m}$ is melted and formed into three smaller cubes. If the edges of the two smaller cubes are $\mathbf{6}\mathbf{}\mathit{c}\mathit{m}$ and $\mathbf{8}\mathbf{}\mathit{c}\mathit{m}$, find the edge of the third smaller cube.

Q. A room is $5m40cm$ long and $3m75cm$ wide. What area of carpet is needed to cover the floor?

1. $20.25m^2$
2. $20.52m^2$
3. $20.15m^2$
4. $20.51m^2$

Q. Identify the true statements about the given object.

1. Area is exactly 15 cm²
2. Area is around 9.5 cm²
3. Area is around 15 cm²
4. Area is exactly 9.5 cm²

Q. What is the area of the given figure? (All dimensions are in $cm$)

1. $46c{m}^2$
2. $60c{m}^2$
3. $36c{m}^2$
4. $80c{m}^2$

Q. What is the area of the banana leaf, if each square unit is $1c{m}^2$?

1. $16c{m}^2$
2. $21c{m}^2$
3. $17c{m}^2$
4. $15c{m}^2$