Question

three cubes each of 5 cm are joined end to end find the surface area of resulting cuboid with figure

Answer 1

When three cubes are joined end to end, then the resulting solid is a cuboid.

Length of the cuboid, l = 2 × each side of the cube = 2 × 5 cm = 10 cm

Breadth of the cuboid, b = each side of the cube = 5 cm

Height of the cuboid, h = each side of the cube = 5 cm

Surface area of the cuboid

= 2 (lb + bh + hl)

= 2 (10 cm × 5 cm + 5 cm × 5 cm + 5 cm × 10cm)

= 2 (50 cm2 + 25cm2 + 50 cm2)

= 2 × 125 cm2.

= 250 cm2.

Thus, the surface area of the resulting cuboid is 250 cm2.

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Rahul , Student

Member since Dec 05 2014

It means joining three cubes length would be 15 nd b=5, h=5, Then calculate the surface area by using 2 (lb+bh+hl) formula

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Answer 2

Length = 5+5+5cm=15cm
Breadth=5cm
Height=5cm
Area= 2(lb+bh+lh)
=2(15*5+5*5+15*5)cm²
=2(75+25+75)cm²
=2*175cm²
=350cm²