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, A_{1} = l × b = 12 × 5 = 60 cm^{2}

(1). area of the rectangular region, A_{2} = 100 × 144 = 14400 cm^{2 }

no. of tiles required = A_{2 }/ A_{1 }= 14400/60 = **240**

(2). area of the rectangular region, A_{3} = 70 × 36 = 2520 cm^{2 }

no. of tiles required = A_{3 }/ A_{1 }= 2520/60 =** 42**

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