Question

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A plastic box 1.5m long 1.25m wide and 65 cm deep is to be made. It is opened at the top. Ignoring the thicknesses of the plastic sheet, determine:

(i) The area of the sheet required for making the box.

(ii) The cost of sheet for it, if A sheet measuring 1m² costs ₹20.

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Answer 1

Answer:

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Answer 2

Question:

A plastic box 1.5m long 1.25m wide and 0.65 cm deep is to be made. It is opened at the top. Ignoring the thicknesses of the plastic sheet, determine:

(i) The area of the sheet required for making the box.

(ii) The cost of sheet for it, if A sheet measuring 1m² costs ₹20.

Given:

• Length of a box = 1.5m.

• Breadth of a box = 1.25m.

• Height of box = 0.65m.

To find:

• The area of the sheet required for making the box.

• The cost of sheet for it, If a sheet measuring 1m² costs ₹20.

Solution:

(i) Area of sheet required fo making the box = 2lb + 2bh + 2lb - lb.

⟹ 2lb + 2bh + 2lb - lb.

Put the given value in formula.

We get,

⟹ [2 × 1.5 × 0.65 + 2 × 1.25 × 0.65 + 1.5 × 1.25] m²

⟹ [1.95 - 1.625 + 1.875] m²

⟹ 5.45m²

∴ The area of sheet required is 4.45m².

(ii) Cost of sheet per m² = ₹20

⟹ Cost of sheet per 5.45m²,

⟹ ₹ 5.45 × 20

⟹ ₹ 109

∴ The cost of sheet is ₹109.