Question

12. How many tiles whose length and breadth are 12 cm and 5 cm
needed to fit in a rectangular region whose length and breadth are
(a) 100 cm and 144 cm (b) 70 cm and 36 cm.
respectively
respectives
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Answer 1

Answer:

area of tile= 12× 5 = 60 cm²

a) area of region =100×144 = 14400 cm²

no. of tiles =14400/60= 240 tiles

b) area of region =70× 36 = 2520 cm²

no. of tiles =2520/60= 42 tiles

Answer 2

Answer:

42 tiles are required

Step-by-step explanation:

Area of region

sq.cm

100 cm x 144 cm = 14400

Area of one tile = 5 cm x 12 cm = 60 sq.cm

Number of tiles =

Area of region

Area of one tile

=14400/60

= 240

Thus, 240 tiles are required.

(b) Area of region = 70 cm x 36 cm = 2520

sq.cm

Area of one tile !! 5 cm x 12 cm = 60 sq.cm

Number of tiles =

Area of region

Area of one tile

=2520/60

= 42

Thus, 42 tiles are required.