SECTION - A

A multistorey building has $25$ floors above the ground level each of height $5 \mathrm{m}$. It also has $3$ floors in the basement each of height $5 \mathrm{m}$. A lift in the building moves at a rate of $1 \mathrm{m}/\mathrm{s}$. If a man starts from $50 \mathrm{m}$ above the ground, how long will it take him to reach the $2^{\mathrm{nd}}$ floor of basement?

In this following figure, $AD$ is the bisector of $\angle A$ such that $AD\perp BC$. Is $ABC$ an isosceles triangle? Give reasons in support of your answer.

The lengths of two sides of an isosceles triangle are $9 \mathrm{cm}$ and $20 \mathrm{cm}.$ What is the perimeter of the triangle? Give reason.

Draw an isosceles triangle with each of equal sides of length $3 \mathrm{cm}$ and the angle between them as $45°$

The order of rotational symmetry in the figure below is

The speed of light in vaccum is $3\times {10}^8 \mathrm{m}/\mathrm{s}$. Sunlight takes about $8$ minutes to reach the earth. Express distance of Sun from Earth in standard form.

Insert $3$ equivalent rational numbers between

$0$ and $-10$

Draw two parallel lines at a distance of $2.2 \mathrm{cm}$ apart.