ththe front wall of house has a door to metre × 1 metre to Windows 1 metre × 7 DM of ventilator 5 DM ×5 dm if the wall is in the form of right angle 5m×4 metre with a triangle on it with base 5 metre and altitude 2 metre find the cost of whitewashing the front wall at rupees 20 per square metre and painting the door Windows and the ventilator at the rate rupees 40 per square metre .
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chakshitij
Secondary School Math 5+3 pts
The front wall of a house has a door 2m × 1m, two windows 1m ×7dm, a ventilator 5dm×5dm. If the wall is in the form of a rectangle 5m×4m with a triangle on it with base 5m and altitude 2m find the cost of the whitewashing the front wall at the rate of 20 rupees per square metre and painting the door , windows, and the ventilator at the rate of 40 rupees per square metre
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chakshitij
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amitnrw
Amitnrw★ Brainly Teacher ★
Rs 573 is cost of the whitewashing the front wall at the rate of 20 Rs /m² and painting the door , windows, and the ventilator at the rate of 40 Rs /m²
Step-by-step explanation:
Area of Front Wall = 5 * 4 = 20 m²
Area of Door = 2 * 1 = 2 m²
Area of Two windows = 2 * 1 * (7/10) = 1.4 m²
Area of a Ventilator =(5/10) * (5/10) = 0.25 m²
Area of Triangle = (1/2) * 5 * 2 = 5 m²
Area of Front wall = 20 + 5 - 2 - 1.4 - 0.25
= 21.35 m²
cost of the whitewashing the front wall at the rate of 20 rupees per square
= 20 * 21.35
= 427 Rs
Area of Door + Area of Two windows + Area of a Ventilator 2 + 1.4 + 0.25
= 3.65 m²
Cost of Painting = 40 *3.65 = Rs 146
Total Cost = 427 + 146 = 573 Rs
Step-by-step explanation: