Shanti Sweets Stall was placing an order for making cardboard boxes for packing
their sweets. Two sizes of boxes were required. The bigger of dimensions
25 cm x 20 cm x 5 cm and the smaller of dimensions 15 cm x 12 cm x 5 cm. For all the
overlaps, 5% of the total surface area is required extra. If the cost of the cardboard is
4 for 1000 cm?, find the cost of cardboard required for supplying 250 boxes of each
kind.
thanks
Answers
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Answer: Rs 7140
Step-by-step explanation:
Surface area of box = 2 (LB+BH+HL)
Surface area of box 1 , s1 = 2 ( 25 x 20 x 5 ) = 5000cm²
5% of s1 = 5/100 * 5000 = 250 cm²
Total surface area of s1 = 5000+ 250 = 5250cm³
Surface area of box 2 , s2 = 2 ( 15 x 12 x 5 ) = 1800cm²
5% of s2 = 5/100 * 1800 = 90cm²
Total surface area of s2 = 1800+ 90 = 1890cm³
cost of cardboard per 1000cm = Rs 4
cost of 1 box of surface area s1 = (5250/1000) x 4
= Rs.21
cost 250 such boxes = 21 x 250 = Rs 5250
cost of 1 box of surface area s2 = (1890/1000) x 4
= Rs. 7.56
cost 250 such boxes = 21 x 250 = Rs 1890
Total cost = 5250+1890 = Rs. 7140
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