Question

Find the sum of lengths of the base of a Trapezium whose area is 4.2 metre square and whose height is 280 CM

Answer 1

Area of a trapezium is 1/2(a+b)h,

where, a and b are the parallel sides,and  

            h is perpendicular height.

So,

if we divide the area(4.2*100*100=42000) by height,

we get 1/2 of the

sum of a and b.

                   42000/280= 150.

Sum of parallel sides = 150*2=300cm=3m.

1.5m*2.8m=4.2 Sq. Meter.