The dimensions of a coboidal tin are 30 cm *40 cm *50 cm. Find the cost of the tin required for making 20 such tins, if the cost of tin sheet is Rs. 20 per square m.
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So L=30cm, B=40cm, H=50cm
TSA of 20 such tins=2(lb+bh+hl)*20
2(30*40+40*50+50*30)*20
2(1200+2000+1500)*20
2*4700*20
40*4700
188000cm²
18.8m²
Cost of 1m² sheet=20Rs
Cost of 18.8m² sheet=20*18.8=376Rs
TSA of 20 such tins=2(lb+bh+hl)*20
2(30*40+40*50+50*30)*20
2(1200+2000+1500)*20
2*4700*20
40*4700
188000cm²
18.8m²
Cost of 1m² sheet=20Rs
Cost of 18.8m² sheet=20*18.8=376Rs
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