Question

What is the C.S.A of resulting solid if two identical cubes are joined end to end together with the length of the sides of the cube is 4 m?

(a) 160 cm^2

(b) 205.6 cm^2

(c) 168.23 cm^2

(d) 604 cm^2

I have been asked this question in class test.

My question is based upon Surface Area and Volume of Combination of Solids in portion Surface Area and Volumes of Mathematics – Class 10

Answer 1

Right option is (a) 160 cm^2

Easy explanation: Cuboid is the resulting solid when two identical cubes are joined end to end together.

Length of the cuboid (l) = 4 + 4 = 16 cm

Height of the cuboid (h) = 4 cm

Breadth of the cuboid (b) = 4 cm

The curved surface area of cuboid = 2h(l + b) = (2 × 4)(16 + 4)

= 160 cm^2