Question

Mensuration
6
The dimensions of a room are 16 x 14 x 10 metres.
There are four windows of 1.3 mx 1.4 m and 2doors
of 2 mx 1 m. What will be the cost of white washing
the walls and painting the doors and window, if the
rate of white washing is Rs 5 per m² and the rate of
painting is Rs 8 per m².​

Answer 1

Step-by-step explanation:

Area of room 16×14×10=2240m²

Area of One window=1•3×1•4=1•82m

Area of four windows=1•82×4=7•28m

Area of one door=2

Area of 2 doors =2×2=4m²

Area of Walls=2240-4+7•28=2228•72m²

The cost of 223o•9m² white washing=2228•72×5=Rs 11143•6

The area of doors and windows=11•28m²

The cost of painting doors and windows=11•28×8=Rs 90•24

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