Question

a room has a floor measuring 15m by 8m it has to be covered with tiles of size 50cm by 25cm how many tails are required if a caepet is laid on the floor so that a space of 1.5m is left around the edges of floor what fraction of floor is uncovered ​

Answer 1

Step-by-step explanation:

area of floor = 15*8 = 120 metre square

area of one tile = 50*25 = 1250 cm square or 12.5 metre square

total number of tiles required to cover the floor = area of floor / area of one tile

= 1250 / 12.5

=100 tiles

now,

the carpet is 1.5m apart from the edges of both the sides , i.e 1.5+1.5 =3 m

we have to subtract 3 m from both length and breadth in order to obtain the dimesions of the carpet

lenght of carpet = 15-3 = 12m

breadth of carpet = 8-3=5m

area = 12*5 = 60m square

uncovered area = 60 metre square

fraction of area uncovered = uncovered area / total area

=60/120

=1/2

hope it helps :D