Lateral surface Area of cuboid

Q.

The Petri dish shown has no lid. What is the surface area of the outside of the Petri dish?

Q. If V is the volume of a cuboid of dimensions a × b × c and A is its surface area, then $\frac{A}{V}$ is

Q. The ratio between the sides of a room is $5:3$. The cost of white-washing the ceiling of the room at $50$ P per square metre is Rs.$270$ and the cost of papering the walls at $10$ P per square metre is Rs.$48$. The height of the room is ...........

Q. The surface area of a rectangular prism is dependent on which of the following dimensions?

1. Length
2. All of the above
3. Width
4. Height

Q. The line $AD$ is divided in the ratio of $AB:BC:CD=1:3:4$. If $AB=0.8cm$, calculate the length of $AD$.

1. $3.5cm$
2. $6.5cm$
3. $6.4cm$
4. $5.89cm$