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CBSE Class 9 Answered

the surface area of a cuboid is 1300cm2 if its breadth is 10cm and height is 20cm , find its length
Asked by bharathkumar | 14 Nov, 2013, 09:52: AM
answered-by-expert Expert Answer
Let L be the length of the cuboid.
We know that:
Surface area of a cuboid = 2(L.B + B.H + H.L)
1300 = 2(L x 10 + 10 x 20 + 20 x L)
650 = 10L + 200 + 20L
450 = 30L
L = 450/30 = 15
Thus, Length of the cuboid = 15 cm
Answered by | 14 Nov, 2013, 10:18: AM

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