Surface Area of Cuboid

Q.

An open cuboidal box has dimensions $20cm\times 10cm\times 5cm$. Find the cost of painting the box from outside if the painting cost is ₹ $2/c{m}^2$.

1. ₹ $500$

2. ₹ 600

3. ₹ $1000$

4. ₹ $2000$

Q. Find out the surface area of the following shape.

1. 
   $140c{m}^2$
2. 
   $156c{m}^2$
3. 
   $121c{m}^2$
4. 
   $144c{m}^2$

Q. From a sheet of 20 m$\times$10 m, 4 squares of side 2.5 m are cut out from the corners and made into a box.$\text{TSA}\mathrm{of}\mathrm{the}\mathrm{box}$ =

1. 175 m${}^2$
2. 100 m${}^2$
3. 150 m${}^2$

Q. For a cube of side 'a' and a cuboid of length 'l', breadth 'b' and height 'h', match the following.

1. $2(lb+bh+lh)$
2. $2h(b+l)$
3. $6a^2$
4. $4a^2$

Q.

A box has length, breadth and height of 10 cm, 20 cm and 5 cm respectively. The lateral surface area of cuboid is:

1. 100 $c{m}^2$​

2. 200 $c{m}^2$​

3. 300 $c{m}^2$​

4. 400 $c{m}^2$​

Q.

A box has length, breadth and height of 10 cm, 20 cm and 5 cm respectively. The lateral surface area of the box is ______.

1. 100 $c{m}^2$​
2. 200 $c{m}^2$​
3. 300 $c{m}^2$​
4. 400 $c{m}^2$​

Q.

A metal sheet 27 cm long, 8 cm broad and 1 cm thick is melted into a cube. The difference between total surface area of the two solids is ______ cm².

1. 280 cm²

2. 284 cm²

3. 286 cm²

4. 296 cm²

Q.

The surface area of a cuboid is 1372 $c{m}^2$. If its dimensions (l:b:h) are in the ratio 4 : 2 : 1, then its length(in cm) is:

1. $14cm$

2. $21cm$

3. $28cm$

4. $24cm$

Q. The length of a cuboid is twice its breadth. The breadth is twice its height. Then, the ratio of LSA to TSA is .

1. $3:7$
2. $7:3$
3. $7:2$

Q.

The formula for finding the total surface area of a cuboid is __________.

1. $2\times (lb\times bh\times hl)$

2. $2h\times (l+b)$

3. $2\times (lb+bh+hl)$

4. $2\times lb\times (bh+hl)$