Question

a cuboidal oil tin is of dimensions 30cm×40cm×50cm.find the cost of tin required for making 20 such tins if the cost of tin sheet is rupee 20 per metre square. ​

Answer 1

HI MATE

dimension of cuboidal tin = 30cm×40cm×50cm

let length = 40cm

breath = 30cm

height = 50cm

Total surface area = 2(lb+bh+lh)

                          = 2(40×30 + 30×50 + 40×50)

                          = 2(1200 + 1500 + 2000)

                          = 2(4700)

                          = 9400 cm²

TSA of one tin box = 9400 cm²

TSA of 20 tin boxes = 9400×20 = 18800 cm² = 1.88m²

Cost of tin = Rs. 20/m²

Total cost = 1.88×20 =Rs. 37.60

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