Question

15. A cuboidal tin box opened at the top has dimensions 20 cm x 16 cm x 14 cm. What is the total area of metal sheet required to make 10 such boxes?​

Answer 1

Answer:

Since we are assuming that the height is 14, the area of the top face would be the product of the other two dimensions, 20 * 16 = 320. So subtract 320 from 1648 to get the total area of metal that is actually needed in each tin. So the result is 1328.

Answer 2

Answer:

Dimensions of cuboidal tin box are 20 cm x 16 cm x 14 cm,

...Area of metal sheet for 1 box = Surface area of cuboid

= 2(lb + bh+hl)

= 2(20 x 16+16 x 14+ 14 x 20)

= 2(320 + 224 + 280)

= 2(824)

= 1648 cm2

... Area of metal sheet required to make 10 such boxes = 10 x 1648 = 16460 cm2

Step-by-step explanation:

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