Very easy! 6 people= 12 servings so 1 person= 2 servings We have 112 people so we need 112 x 2= 224 servings So she will make 224 servings with an 8 servings pan, 224/8= 28 pans. The minimum number of pans she need in order to serve 112 people is 28 pans!
take a line segment of 5.3 cm mark it as A & B. add 1cm to it mark the 3rd point as C. from point B draw a perpendicular line . construct perpendicular bisector of A and C.