Question

find the total surface area of a closed cardbord box of lenghth o.5 m, breadth 25 cm and height 15 cm

Answer 1

T.S.A equal to 2(lh+bh+lb)
l equal to 0.5m equal to 5 cm
b equal to 25cm
h equal to 15 cm

T.S.A. equal to 2(5*15+25*15+5*25)
2( 75+375+125)
2(575)
1150 c m cub