Question

40. The figure shows a square with side 3 cm inside a square with side 7 cm, and
another square with side 5 cm which intersects the first two squares.
What is the difference between the area of the black region and the total area of
the grey regions?
(A) 0 cm?
(B) 10 cm?
(C) 11 cm
(D) 15 cm?
(E) impossible to determine​

Answer 1

Answer:

40. The figure shows a square with side 3 cm inside a square with side 7 cm, and

another square with side 5 cm which intersects the first two squares.

What is the difference between the area of the black region and the total area of

the grey regions?

Answer is (D).15cm