A room is $8 m$ long, $6 m$ broad and $5.5 m$ height . It has one of the Dimension $2.5 m$ by $2 m$ and $2$ Windows each of dimensions 1.5 by 1 m. find the cost of whitewashing the walls at $R s .3 .20$ per square meter.

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Solution

area of walls to be whitewashed $=$ area of walls $-$ area of doors and Windows
$= 2 h (l + b) - 2 \times 2.5 - 1.5 \times 2$
$264 - 5 - 3$
$= 256 m^{2}$
cost of whitewash $= 256 \times 3.2$
$= 819.2 r s$

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A room is 8m long, 6m broad and 5.5m height . It has one of the Dimension 2.5m by 2m and 2 Windows each of dimensions 1.5 by 1 m. find the cost of whitewashing the walls at Rs.3.20 per square meter.

area of walls to be whitewashed = area of walls − area of doors and Windows =2h(l+b)−2×2.5−1.5×2264−5−3=256m2cost of whitewash =256×3.2=819.2rs

A room is $8 m$ long, $6 m$ broad and $5.5 m$ height . It has one of the Dimension $2.5 m$ by $2 m$ and $2$ Windows each of dimensions 1.5 by 1 m. find the cost of whitewashing the walls at $R s .3 .20$ per square meter.

area of walls to be whitewashed $=$ area of walls $-$ area of doors and Windows
$= 2 h (l + b) - 2 \times 2.5 - 1.5 \times 2$
$264 - 5 - 3$
$= 256 m^{2}$
cost of whitewash $= 256 \times 3.2$
$= 819.2 r s$