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оо28. A class room is 7m long, 6.5m wide and 4m high. It has one door 3m X 1.4m and threewindows measuring 2m x 1m.the rate of Rs 3.50 per m2.The interior walls are to be painted. Find the cost of painting at |
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Answer» Area of four walls=(2h(l+b))=(2x4(7+6.5))=(8x13. 5)=108m squarearea of one window =3mx1. 4m=4.2m squarearea of three window =3(2mx1m)=6m squaretotal area of windows =(4.2+6)m square=10.2m squareArea for whitewashing =(108-10.2)m square=97.8m square cost of 1 m square white washing = 3.50rupeecost of 97.8m square white washing=3.50x97.8=342.3 rupees |
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