How many tiles whose length and breadth are 12 cm and 5 cm respectivel

1.	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.
Answer» (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

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.

Answer»

(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