The base of a triangular prism is $△\mathrm{ABC}$, where $\mathrm{AB}=3 \mathrm{cm}$, $\mathrm{BC}=4 \mathrm{cm}$ and $\angle \mathrm{B}=90°$. If the height of the prism is $10 \mathrm{cm}$. Find lateral surface area and total surface area.

How many rectangular surfaces are there in a prism?

The perimeter and the breadth of a rectangle are $52 cm$ and $12 cm$ respectively. Find its area in $c{m}^2$.

What is the volume of the sphere whose diameter is $42 \mathrm{cm}?$

(Take $\pi =\frac{22}{7}$)

Differentiate between a glass slab and a glass prism.

Explain the refraction of light with the help of a Glass Prism.

A student traces the path of a ray of light through a glass prism as shown in the diagram, but leaves it incomplete and unlabelled. Redraw and complete the diagram. Also, label on it $\angle i, \angle e, \angle r$ and $\angle D$.