A cuboidal oil tin is 30 cm by 40 cm by 50 cm. Find the cost of tin required for making 20 such tins if the cost of Tin required @ Rs. 20.
Given,
length (l) = 30 cm
breadth (b) = 40 cm
height (h) = 50 cm
Area of tin = total surface area of cube
= 2(lb +bh + hl)
= 2[(30)(40) + (40)(50) + (50)(30)]
= 2[1200 + 2000 + 1500]
= 2 × 4700
= 9400cm2
Cost of tin = Rs. 20 per cm2
⇒ cost of 1 tin = 9400 × 20
= Rs 188000
Cost of 50 such tin = 50 × cost of 1 tin
= 50 × 188000
= 9400000
So, cost of such 50 cans is Rs 9400000
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