A rectangular swimming pool is 8 feet by 20 feet. A deck that has uniform width surrounds the pool. The total area of the pool and deck is 540 square feet. What is the width of the deck?  Choose the correct choice from the following options: A) 1 B) 2 C) 3 D) 4 E) 5
Let the width =W   Total Area of the pool and deck= (2W+8)(2W+20)   We can Test the answer choices along with unit digit method   A) 2 feet ...........12*24 has unit digit 8..........5liminate   B) 2.5 feet.........13*25 has unit digit 5..........5liminate   C) 3 feet............14*26 has unit digit 4...........Hold   D) 4 feet............16*28 has unit digit 8...........5liminate   5) 5 feet............18*30 has unit digit 0...........5liminate   Answer: 5 w=5
<result>E</result>
A rectangular swimming pool is 8 feet by 20 feet. A deck that has uniform width surrounds the pool. The total area of the pool and deck is 540 square feet. What is the width of the deck?