floor tiles are 25 cm squares . How many tiles will be needed for a rectangular lawn 12m long and 10m wide. Find the total cost at the rate of 8rs.
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Step-by-step explanation:
number of tiles is simply area of the room divided by area of just one tile
hence12m × 10 m
=120m squared.
area of the tile is 25 cm squared..
change the units to m squared.
NB ALWAYS USE THE SAME UNITS PLEASE.
25 cm squared divided by 10000 =0.025m squared
hence 120 /0.025=4800 tiles for the lawn....
then the cost ...
8rs × 4800 tiles=38400
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