Question

The mean length of the bases of a trapezium is $150cm$. Find the area of the trapezium if its altitude is $80cm$.

Answer 1

Since, Mean of $a$ and $b$ $=\frac{a+b}{2}$

i.e., In trapezium,

Mean of the bases $=\frac{1}{2}$ (Sum of bases) $=150cm$

Area of trapezium

$=\frac{1}{2}$ (Sum of bases) $\times$ Height

$=150cm\times 80cm$

$=12000c{m}^2$

Hence, The area of trapezium is $12000c{m}^2$.