Question

The area of a rectangular feild is 450 and the difference between the lengths of the two adjacent sides is 7m. Find
a) The length of the shorter side,
b) The perimeter of the field

Answer 1

Answer:

l-b=7,l=7+b

area of rectangle =7+b×b=450

7b+b^2-450

b^2+25b-18b_480

b(b+25)-18(b+25)

(b+25)(b-18)

18=b

perimeter =(18+25)×2=86