Question

A chessboard is made of small squares of equal side lengths. If the perimeter of the chessboard is 20 cm, what could be the value of (a+b)?​

Answer 1

Step-by-step explanation:

side*side=20

side²=20

side=10

hope it helps you

Answer 2

Answer:

a + b = 11.

Step-by-step explanation:

Given :- Perimeter of the chessboard = 20 cm.

             Sides of chessboard = (a - 3) and (b + 2)

To Find :- Value of a + b.

Solution :-

Since chessboard is made of small squares, which means chessboard is also a square.

Since perimeter of chessboard = 20 cm.

∴ each side of chessboard = 20 ÷ 4

                                             = 5.

From information provided in question, we can write that

⇒ a - 3 = 5         &         ⇒ b + 2 = 5

⇒ a = 5 + 3        &         ⇒ b = 5 - 2

⇒ a = 8              &         ⇒ b = 3

Therefore, value of a + b = 8 + 3 = 11.

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