a room is 15 meter long and 12 meter wide . there is a baramada of a uniform width all over it , having an area of 90 meter2 .find the width of the baramada .
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Answer:
.Width of baramuda=x,m
Area.... (I5 +2x) x (12+2x) -15x12=90
4x^2+54x+l80-I80=90
4x^2+54x-90=0
2x^2+27x-45=0
using
-b+vb^2-4ac/2a
or
-b-vb^-4ac/2a
- 27+v 27^2-4x2x-45/2x2
-27 +V729 +360/4
-27 +v1089/4
-27 +33 / 4=6/4=3/2=1.5m
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