Question

Sanjiv Desk Work
Area of trapezium is 140 cm. Its height is 10 cm the difference of its
arallel sides is 4 cm. Find the length of both parallel sides.
n:​

Answer 1

Step-by-step explanation:

Area of trapezium=1/2h(l₁+l₂)

140 = 1/2⨯10(l₁+l₂)

140/5=l₁+l₂

18= l₁+l₂

as difference of parallel sides is 4 cm

l₁ be |x| and l₂ be x-4

l₁+l₂=18cm

x+x-4=18cm

l₁=x=11cm

Now, l₂=x-4

=11-4=7