Question

find the area of a trapezium whose parallel sides are 80dm and 6m and altitude is 40dm hint:10dm=1m

Answer 1

area of trapezium =1/2*sum of parallel sides*distance between them
1dm=1m 80dm =8m 40dm=4m
1/2（8+6）*4
1/2*14*4
1/2*56
28msquare

Answer 2

heres your answer

hope it helps