Question

please answer me fast.I want it in my homework..

Answer 1

solution :

Area to be polished  = (110 × 85 + 2 × 85 × 25 + 2 × 25 × 110 + 4 × 75 × 5 + 2 × 110 × 5)cm2
                                    = (9350 + 4250 + 5500 + 1500 + 1100)cm2
                                    = 21700 cm2
Cost of polishing @ 20 paise per cm2
=(21700×20100)=4340
Area to be painted = (6 × 75 × 20 + 2 × 90 × 20 + 75 × 90)cm2
                                = (9000 + 3600 + 6750) cm2 = 19350 cm2
Cost of painting @ 10 paise per cm2=(19350×10100)=Rs1935
Therefore total expenses =Rs (4340 + 1935) =Rs  6275