S.N. Chhibber Solutions for Chapter: Perimeter and Area of Plane Figures, Exercise 3: Exercise

Find the area of rhombus whose one side is $13 \mathrm{cm}$ and altitude is $10 \mathrm{cm}$ in $x {\mathrm{cm}}^2$, then the value of $x$.

The sides of a triangle are $12 \mathrm{cm}, 35 \mathrm{cm}$ and $37 \mathrm{cm}$ respectively. Find if its area in $x {\mathrm{cm}}^2$, then the value of $x$.

One of the sides of an equilateral triangle is of length $12 \mathrm{cm}$. If the area of the triangle is $a\sqrt{b} {\mathrm{cm}}^2$, where $a>b$,then the value of $a+b$ is

If the area of an equilateral triangle is $16\sqrt{3} {\mathrm{cm}}^2$ and the length of the side of the triangle is $a \mathrm{cm}$ then find the value of $a$.

The area of a trapezium is $121 {\mathrm{cm}}^2$ and its height is $11 \mathrm{cm}$. If one of the parallel sides is shorter than the other by $10 \mathrm{cm}$, find the two parallel sides.

If the area of the trapezium is $k {\mathrm{cm}}^2$, then find the value of $k$ whose the length of parallel sides are $16 \mathrm{cm}$ and $20 \mathrm{cm}$ and the distance between them is $12 \mathrm{cm}$.

The parallel sides of a trapezium are $12 \mathrm{m}$ and $18 \mathrm{m}$ and the distance between them is $6.4 \mathrm{m}$. If the area of the trapezium is $k {\mathrm{m}}^2$, then find the value of $k$.

The area of a trapezium is $850 {\mathrm{cm}}^2$. The measure of one of the parallel sides and the perpendicular distance between them is $64 \mathrm{cm}$ and $17 \mathrm{cm}$ respectively. If the measure of other parallel side is $k \mathrm{cm}$, then find the value of $k$.