Summer Clouds moderators
31/10/2017 at 08:50-
Let a and b be the length and width of the rectangle in cm (a > b > 0), then 2a + 2b = 62
The area of the new rectangle is :
(a + 2)(b + 2) = ab + 2a + 2b + 4 = ab + 66
So, the answer is 66 cm2
Selected by MathYouLike -
tth 31/10/2017 at 10:09
We have: The perimeter = 62 cm
=> \(\dfrac{1}{2}\) perimeter = 62 : 2 = 31 cm
The area of the each increased is:
2 . 2 = 4 cm
So square centimeters does area increase is:
4 . 31 = 124 cm2
Ans: 124 cm2
N/t: But I don't certain