Posted by **Chandan kumar** on Sunday, November 6, 2011 at 1:06am.

A cuboid has total surface area of 40 meter squar and its lateral surface area is 26 meter squar .Find the area of its surface

- Maths -
**MathMate**, Sunday, November 6, 2011 at 8:28am
Total surface area-lateral surface area

= 2*(surface of top + surface of bottom)

40-26

2*(surface of top + surface of bottom)=14

surface of top (or bottom) = 14/2=7

- Maths -
**Umakant**, Monday, March 7, 2016 at 5:52am
Surface area =2(L+b)×h

- Maths -
**panchami**, Saturday, November 26, 2016 at 11:20am
T.S.A=2(lb+bh+lh)

lb+bh+lh= 40/2 [eq 1]

L.S.A= 2h(l+b)

26/2=lh+bh [eq 2]

from eq 1&2 we get,

lb+13=20

lb=7cm

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