Question

Find the cost of painting the four walls and the
celling of a room at the rate of RS 14 Per m²
if perimeter of the base with equal sides is
80m and height of the room is 9.5m. Also find
the volume.​

Answer 1

Answer:

your answer is in the pic..

hope this helps you dear..

Answer 2

Answer:

$\sf{Perimetre\:of\:square\:shaped\:floor\:=80\:m}$

$\sf{4a\:=\:80}$

$\sf{➠\:A\:=\:20\:m}$

$\sf{Thus\:length\:(a)\:=\:20\:m,\:Breadth\:and\:height}$

$\sf{(h)\:=\:9.5\:m}$

$\sf{Area\:of\:four\:walls\:and\:top}$

$\sf{2(a+a)h+a²}$

$\sf{=\:2(20+20)×9.5+20²}$

$\sf{=\:1160\:m²}$

$\sf{Cost\:of\:painting\:1\:m²\:=\:Rs\:14}$

$\sf{Therefore,\:cost\:of\:painting\:1160\:m²}$

$\sf{=\:Rs\:{1160×14}\:=\:Rs\:16240}$

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