Reema spent Rs 54000 to paint three of the four walls of her room.If t

1.	Reema spent Rs 54000 to paint three of the four walls of her room.If the rate of painting is Rs 45/m square , find the length of the side of the room
Answer» Answer: Length of the side of room is $20\sqrt{3}$ Step-by-step explanation: Money spent by Reema to paint three side of four walls of room = Rs 54000 Rate of painting = Rs 45/m square Area of the three sides painted is calculated as $Area = \frac{54000}{45}\\\\Area = 1200$ Assuming that room is in shape of cube, THUS all the sides of wall are same Thus, area for 3 sides = 1200 Area of ONE side is calculated as $Area = \frac{1200}{3}\\\\Area = 400$ We know, Area of square is calculated as $Area = Side^2\\\\1200 = Side^2\\\\Side = \pm\sqrt{1200}\\\\Side = \pm20\sqrt{3}$ Side can NEVER be negative Hence, $Side = 20\sqrt{3}$ Length of the side of room is $20\sqrt{3}$