Problema Solution
A square's side is increased by 10 yards, which corresponds to an increase in the area by 220 square yards. How many yards is the side of the initial square?
Answer provided by our tutors
Let initial side = x yards.
then,
(x+10)2 = x2+220
or, x2+20x+100 = x2+220
or, 20x = 120
so, x = 6 yards.