The number of marble slabs of size $20\, cm \times 30\, cm$ required to pave the floor of a square room of side $3\, m$ is:

If the area of a triangle with base $x$ is equal to the area of a square with side $x,$ then the altitude of the triangle is

The circumferences of two circles are $132 \text{ m}$ and $176 \text{ m}$ respectively. What is the difference between the area of the larger circle and that of the smaller circle (in $\text{m}^2$)?

If the area of a square is $50$ $sq$ units,then the area of the circle drawn on its diagonal is

Height of an equilateral triangle is $9 \ cm$. Find its area?

Find the number of bricks,each measuring $25\, cm \times 12.5\, cm \times 7.5\, cm$,required to construct a wall $12\, m$ long,$5\, m$ high,and $0.25\, m$ thick,if the sand and cement mixture occupies $5\%$ of the total volume of the wall.