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in Mensuration by (65.5k points)

How many tiles whose length and breadth are 12 cm and 5 cm respectively will be needed to fit in a rectangular region whose length and breadth are respectively:

(a) 100 cm and 144 cm

(b) 70 cm and 36 cm.

1 Answer

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(a) Total area of the region = 100 × 144 = 14400 cm2

Area of one tile = 12 × 5 = 60 cm2

Number of tiles required = 14400/60 = 240

Therefore, 240 tiles are required.

(b) Total area of the region = 70 × 36 = 2520 cm2

Area of one tile = 60 cm2

Number of tiles required  = 2520/60 = 42

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