A class room is 7m long, 6.5m wide and 4ma high. It has one door 3mwindows measuring 2mthe rate of Rs 3.50per m2,X 1.4m andthreeof painting atx Im.The interior walls are to be painted. Find the cost

A class room is 7m long, 6.5m wide and 4ma high. It has one door 3mwin

1.	A class room is 7m long, 6.5m wide and 4ma high. It has one door 3mwindows measuring 2mthe rate of Rs 3.50per m2,X 1.4m andthreeof painting atx Im.The interior walls are to be painted. Find the cost
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