Maths · Straight line: Various forms of equations of a line, intersection of lines, angles between two lines
The dimensions of a room are There are 2 doors and 3 windows in the room. The di
The dimensions of a room are \( 10 \mathrm{m} \times 7 \) \( \mathrm{m} \times 5 \mathrm{m} . \) There are 2 doors and 3 windows in the room. The dimensions of the doors are \( 1 \mathrm{m} \times 3 \mathrm{m} \). One window is of the size \( 2 \mathrm{m} \times 1.5 \mathrm{m} \) and other two windows are size \( 1 \mathrm{m} \times 1.5 \mathrm{m} \). The cost of painting the walls at Rs. 3 per \( m^{2} \) is
- A. Rs. 474.00
- B. Rs. 578.00
- C. Rs. 648.00
- D. Rs. 849.00
Step-by-step solution
Calculate total wall area: 2*(10*5) + 2*(7*5) = 100 + 70 = 170 m². Subtract door area: 2*(1*3)=6 m². Subtract window area: (2*1.5)+(2*1*1.5)=3+3=6 m². Net area = 170 - 12 = 158 m². Cost = 158 * 3 = Rs. 474.
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