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CBSE Class 9 Answered

Find the cost of sheet required for making a cuboidal box measuring 3 m × 5 m × 3.5 m, if 1 m2 costs Rs 21.

Asked by Topperlearning User | 23 Aug, 2017, 12:57: PM
Expert Answer

Surface area of a cuboid =, where l=length, b=breadth and h=height

Given: l=3 m, b=5 m and h=3.5 m

Area of sheet required=Surface area of a cuboid

 = 2{(3 × 5) + (5 × 3.5) + (3 × 3.5)} m2

                                                    = 86 m2

Cost of 1 m2 of sheet = Rs 21

Therefore, cost of 86 m2 of sheet=Rs {86×21}

                                                            =Rs 1806

Answered by | 23 Aug, 2017, 02:57: PM
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