Homework Help: maths

Posted by Anonymous on Saturday, January 26, 2013 at 8:03am.

A cuboidal room is 1 and 1/2 as long again as it is broad.
The cost of carpeting the room at the rate of Rs.5 per m sq is Rs.480 and the cost of papering the walls with coloured paper at the rate of Rs.3 per m sq is Rs.360. Find the dimensions of the room .

maths - oluchi, Saturday, January 26, 2013 at 8:47am
taking d floor of d room
area=l*b
l=1.5x, b=x
A=1.5x*x=1.5xsquare.......eq 1
4rm d price
1sq meter will cost rs.5
dere4 x square meter will cost rs.480
(480*1)/5=96square meters
area=96.......eq 2
96=1.5x^2mspuare
x^2m=64; x=8
lenght =1.5*8=12; breadth =8
4 d height==> rs.3........1sq meter
den rs.360.........xsq meter
x=120square meter
let area= height*breadth
120=h*8
h=15m
dimension=12m by 8m by 15m

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