Question

The length ,breadth and the height of a cuboidal box 2.1 m ,1m and 80m respectively.find the area of the canvas required to cover the box .also find cost of canvas at ₹45 per m square

Answer 1

Here is ur answer :

Length l of cuboid = 2.1 m

Breadth b of cuboid = 1 m

Height h of cuboid = 80 cm = 0.8 m

( i ) Area of canvas required to cover this box.

= 2 ( lb + bh + hl )

= 2 ( 2.1 × 1 + 0.8 × 1 + 2.1 × 0.8)

= 2 ( 2.1 + 0.8 + 1.68 )

= 2 ( 4.58 )

= 9.16 m²

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( ii ) Cost of canvas required to cover the box at rupees 45 per m square.

1 m² = Rs 45

9.16 = Rs 45 × 9. 16