Question

three cubes of side 5cm are joined together .the total surface area of the new solid formed will be​

Answer 1

Answer:

Step-by-step explanation:

Length of each side of cube = 5 cm

Now, 3 cubes are joined end to end.

So, the length of the resulting cuboid will be = 5+5+5 = 15 cm

But, the breadth and height will remain the same.

So, Breadth = 5 cm and Height = 5 cm

Surface area of the cuboid = 2(LB + BH +HL)

= 2(15*5 + 5*5 + 5*15)

= 2(75 + 25 + 75)

= 2*175

Surface area of the cuboid = 350 sq cm

Answer 2

Step-by-step explanation:

the length l =5cm

the breadth b =5cm

the height h =15cm

the total surface area=2(lb+bh+hl)

=2(25+75+75)

=2(175)=350cm^2