Question

Find the cost of painting the four walls of a
room at the rate of Rs per square metre, if its
perimeter is 100 m and height 9 m.​

Answer 1

Step-by-step explanation:

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Answer 2

                           

$\Huge \underline{\mathcal \pink{A}\purple{\frak{nSwer}}}$

$Area \: of \: four \: walls = 2(l + b)h$

                             

$= 100 \: \times \: 9$

                           

$= 900$

$Cost \: of \: painting$

$= rate \: \times area$

                       

$= Rs \: 9 \times \: 900$

                         

$8100 \: rs$