The shape of the top surface of a table is a trapezium. Find its area if its parallel sides are
$1m$ and $1.2m$ and the perpendicular distance between them is $0.8m$.

The correct option is A: $0.88m^2$

Here one parallel side of the trapezium $\left(a\right)=1m$

Second parallel side $\left(b\right)=1.2m$, and height $\left(h\right)=0.8m$

$\therefore$ Area of top surface of the table $=$ Area of the trapezium

$=\frac{1}{2}\times \text{Sum of parallel sides}\times \text{Height}$

$=\frac{1}{2}\times (a+b)\times h$

$=\frac{1}{2}\times (1+1.2)\times 0.8$

$=\frac{1}{2}\times 2.2\times 0.8$

$=0.88m^2$
Hence, the surface area of the table is $0.88m^2$