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The total surface area of a …

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The total surface area of a box of breadth 6cm and height 4cm is 308cm. Find its length

Posted by Mayank Singh 6 years, 3 months ago

CBSE > Class 08 > Mathematics

1 answers

Yogita Ingle 6 years, 3 months ago

Total surface are of a box = 2( lb + bh + hl )

given height and breadth = 6 CM and 4 CM respectively

now according to question

308 = 2 ( 4L + 6*4 + 6L)

308/2 = 10L + 24

154 -24 = 10L

130 = 10L

L = 130/10

length = 13 CM

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