How many tiles whose length and breadth are 12cm and 5cm respectively will be needed to fit in a rectangular region whose length and breadth are respectively.
a) 100cm and 144cm b) 70cm and 36ccm.
Length of each tile, l = 12 cm
breadth of each tile, b = 5 cm
area of each tile, A1 = l × b = 12 × 5 = 60 cm2
(1). area of the rectangular region, A2 = 100 × 144 = 14400 cm2
no. of tiles required = A2 / A1 = 14400/60 = 240
(2). area of the rectangular region, A3 = 70 × 36 = 2520 cm2
no. of tiles required = A3 / A1 = 2520/60 = 42