Posted by Chandan kumar on .
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,
Total surface arealateral surface area
= 2*(surface of top + surface of bottom)
4026
2*(surface of top + surface of bottom)=14
surface of top (or bottom) = 14/2=7 
Maths 
Umakant,
Surface area =2(L+b)×h

Maths 
panchami,
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