R S Aggarwal Solutions for Chapter: Mensuration, Exercise 4: EXERCISE 20D

If the area of the triangle is $k {\mathrm{cm}}^2$, in which base $=42 \mathrm{cm}$ and height $=25 \mathrm{cm}$, find the value of $k$.
 

If the area of the triangle is $k {\mathrm{m}}^2$, in which base $=16.8 \mathrm{m}$ and height $=75 \mathrm{cm}$, then find the value of $k$.

Find the area of an equilateral triangle each of whose sides measures$18 \mathrm{cm}$ is $k c{m}^2$. Find the value of $k$. Take $\sqrt{3}=1.73$

Note: WRITE THE FINAL ANSWER UP TO TWO DECIMAL PLACES

If the area of the triangle in which$\mathrm{a}=13 \mathrm{m}, \mathrm{b}=14 \mathrm{m}, \mathrm{c}=15\mathrm{m}$ is $k m^2$. Then find the value of k.

If the area of the triangle in which a= 52cm, $\mathrm{b}=56 \mathrm{cm}$, $\mathrm{c}=60 \mathrm{cm}$ is $k c{m}^2$. then find the value of $k$
 

If the area of the triangle in which $\mathrm{a}=91 \mathrm{m}, \mathrm{b}=98 \mathrm{m}, \mathrm{c}=105 \mathrm{m}$ is $k m^2$. Then find the value of $k$.

In the following figure,If the area of the shaded region is $k c{m}^2$, then find the value of $k$.

Find the area of quadrilateral $\mathrm{ABCD}$ in which diagonal $\mathrm{BD}=24 \mathrm{cm}$. $\mathrm{AL}\perp \mathrm{BD}$ and $\mathrm{CM}\perp \mathrm{BD}$ such that $\mathrm{AL}=5 \mathrm{cm}$ and $\mathrm{CM}=8 \mathrm{cm}$.