Find the area, in square metres, of the trapezium whose bases and altitudes are: bases = 12dm and 30dm, altitude = 10dm

Explanation

Given
Base of trapezium `(b1)=150dm`
`=(150/10)m`
`=15m .[:.1dm=(1/10)m]`.
Base of trapezium `(b2)=30dm`
`=(30/20)m`
` =3m`.
Height of trapezium`(h)=9 dm`
`=(9/10)m`
`=0.9m`.
N0w ,area of trapezium`=(1/2)xx(b1+b2)xxh`
`=(1/2)xx(15+3)xx(0.9)`
`=(1/2)xx18xx0.9`
`=8.1m^2`.