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Irina18 [472]
3 years ago
7

Jamie is trying to work out the surface area of the cuboid below. Spot any mistakes and write the correct answer.

Mathematics
1 answer:
umka21 [38]3 years ago
7 0

Step-by-step explanation:

The dimensions of the cuboid are 5 cm, 7 cm and 9 cm.

The formula for the surface area of the cuboid is as follows :

A=2(lb+bh+hl)

We have,

b = 9 cm, l = 7 cm and h = 5 cm

So,

A=2(9\times 7+9\times 5+7\times 5)\\\\A=2\times 143\\\\A=286\ cm^2

Jamie forgets to multiply 143 by 2 as the formula for surface area contains 2 as well.

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