The length of hall is 18 m and width is 13.5 m.find the least number of square tiles each of side 25 cm leaving a margin of width 1.5 m all around
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L = 18m
B = 13.5m
l = 18 - 1.5 = 16.5
b= 13.5 - 1.5 = 12
a = 25cm=2.5 m
area of hall except margin = 18*13.5 - 16.5*12
= 243 - 198
= 25 m
area of tile = 0.25*0.25
=0.0625
no of tile = 25/0.0625 =400
B = 13.5m
l = 18 - 1.5 = 16.5
b= 13.5 - 1.5 = 12
a = 25cm=2.5 m
area of hall except margin = 18*13.5 - 16.5*12
= 243 - 198
= 25 m
area of tile = 0.25*0.25
=0.0625
no of tile = 25/0.0625 =400
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