The surface area of a rectangular prism is 150 cm². If all the sides are tripled, what will the new surface area be?

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24-11-2016
Mathematics

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The surface area of a rectangular prism is 150 cm². If all the sides are tripled, what will the new surface area be?

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apologiabiology apologiabiology · Answer 1 · 2016-11-24T06:20:30+01:00

apologiabiology apologiabiology

24-11-2016

SA=2(LW+LH+WH)
if all are trippled then

SA=2(3L3W+3L3H+3W3H)
SA=2(9LW+9LH+9WH)
SA=2(9)(LW+WH+WH)
SA=9(2(LW+WH+WH))
the SA will be multiplied by 9

150 times 9=1350

new surface area is$1350 cm²

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syed514 syed514 · Answer 2 · 2016-11-25T18:02:21+01:00

syed514 syed514

25-11-2016

Area of rectangle = length * breadth
if all the sides are tripled,,
New Area = 3*length * 3*breadth=9*length*breadth=9*150

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