Question

find the missing value of this trapezium with the following data:
length a = 25 CM
length B equals to?
height equals to 40 cm
area = 1100 CM square

please write the formula from which you found out

Answer 1

area of trapezium = 1/2sum of the parallel side *height
=1/2(a+b) *h use this
=1/2(25+b)*40=1100
=25+b=1100*2/40=55
=b=55-25=30
hope you got the ans