Question

36. (2)
Side of cube ( a=5 mathrm{cm} ) (given) and Length of cuboid ( l=(5+5+5)=15 mathrm{cm} ) ( b=5 mathrm{cm}, h=5 mathrm{cm} )
( therefore ) Surface Area of cuboid
( =2(1 times b+b times h+1 times h) )
( =2 times(15 times 5+5 times 5+15 times 5) )
( =2 times(75+25+75) )
( =2 times 175=350 mathrm{cm}^{2} )

# 36. Three cubes each of side 5 cm are joined end to end. What is the surface area of the resulting cuboid? (1) 300 cm2 (3) 375 cm? (2) 350 cm? (4) 400 cm2

Solution