Question

2 cubes eaches of volume 64 cm 3 are joined end to end . find the surface area of the resulting cuboid. Q 11 if the radius of a circle is 6.3 cm, compute it's area and circumference.​

Answer 1

Answer:

Step-by-step explanation:

1. Let side of the cubes in cm is a.Then, a3=64⇒a=4

If we join these two cubes end to end, then surface area of resulting cuboid will have 10 faces

as two internal faces are common will not be included in the cuboid.

Please refer to video for graphical explanation.

So, surface area of resulting cuboid, A=10∗Surface area of each face

A=10∗(4)2=160cm2

2. A≈124.69cm²