Question

A cuboidal oil tin is 3ocm x 40cm x 50cm Find the cost of the tin required for making 20 usch tins if the cost of tin sheet is Rs 20/m2

Answer 1

length =l= 30cm
breadth = b=40cm
heiaght =h =50 cm
we have to find total surface area = 2(lb+lh+bh)
=2(30*40+30*50+40*50)
=2(1200+1500+2000)
=2*4700
=9400 sq cm
sheer required for 20 such tins = 20 *9400= 188000sq cm
=188000* 1/10000 m²
=188/10 m²

cost 1m²= Rs 20
cost of total sheet = 188/10 * 20=Rs376