Question

A rectangular garden, 42 feet by 20 feet, is surrounded by a walkway of uniform width. If the total area of the garden and walkway is 1248 square feet, the width of the walkway is _____.

[A] 2.5 ft [B] 3 ft [C] 2 ft [D] 3.29 ft

Answer 1

Would I use the formula w= a/l?