Question :

2 cubes each of volume 64 cm3 are joined end to end. Find the surface area of the resulting cuboids.

Subject

Math

Standard

Class 10

Views

890

Asked By

Qayanat

Emily
Answer / Solution

Given that, Volume of cubes = 64 cm3. If we say that edge of the cube be x than (x)3 = 64 i.e. x = 4 cm.

Now, If cubes are joined end to end, the dimensions of the resulting cuboid will be 4 cm, 4 cm, 8 cm

We have the formula of to find the surface area of a cuboid is 2(lb + bh + hl)

= 2 (4 × 4 + 4 × 8 + 4 × 8)

= 2 (16 + 32 + 32)

= 2 × 80

= 160 cm2

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