Q.5 An ant is moving around a few food pieces of different shapes scattered on the floor. For which food-piece would the ant have to take a longer round?
Remember, circumference of a circle can be obtained by using the expression , where r is the radius of the circle.
(a) circumference
(b)circumference
(c) circumference
Hence, the perimeter of (b) is highest so ant have to take a longer round in (b).