Question 1 of 50

A piece of a jigsaw puzzle has 3 identical semicircles cut out form a rectangular piece of cardboard as shown figure below. The perimeter of this piece of jigsaw is 84 cm and the diameter of each semicircle is 7cm. Find the length of AB.

Question Image of A piece of a jigsaw puzzle has 3 identical semicircles cut out form a rectangular piece of cardboard as shown figure below. The perimeter of this piece of jigsaw is 84 cm and the diameter of each semicircle is 7cm. Find the length of AB. .
A
5
B
10
C
15
D
20
E
None of the above