A box without the lid is made of 3cm thick. wood whose external length,breadth,height are 146cm, 116cm, 83cm respectively. find find the cost of painting internal surface box at rate 2 rupees per 1000 square cm.
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for internal body,
L=146-6=140cm
B=116-6=110 cm
H=83-3=80 cm
area painted = LB+2BH+2HL= 140*110+2*110*80+2*80*140
=15400+17600+22400=55400cm²
cost =2*55400/1000=110.8
L=146-6=140cm
B=116-6=110 cm
H=83-3=80 cm
area painted = LB+2BH+2HL= 140*110+2*110*80+2*80*140
=15400+17600+22400=55400cm²
cost =2*55400/1000=110.8
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