the dimensions of a room is 14m and 24m . if a border with tiles of 1m square are laid on all along its sides, then find the number of such tiles needed..
Answer is 72 tiles..
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Answers
Given : dimensions of a room is 14m and 24m .
border with tiles of 1m square are laid on all along its sides
To Find : the number of tiles needed..
Solution:
dimensions of a room is 14m and 24m
Area of floor = 14 x 24 = 336 m²
a border with tiles of 1m square are laid on all along its sides,
Hence Size remains after laying tiles
= 14 - 1 - 1 and 24 - 1 - 1
= 12 and 22 m
Area of Floor excluding border = 12 x 22 = 264 m²
Area of Border = 336 - 264
= 72 m²
Area of a tile = 1 x 1 = 1 m²
Number of tiles required = 72/1 =72
72 Tiles needed.
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