If two cubes of sides 10 cm each be joined side by side, then what will be the total surface area of the produced cuboid ?

Explanation

The length of the produced cuboid = (10 + 10) cm = 20 cm and the breadth of it ' remains 10 cm.
Obviously, height of the cuboid = · 10 cm. So, the total surface area of the cuboid `= 2 (20 xx 10 + 10 xx 10 + 10 xx 20)` sq-cm
`= 2xx (200 +100 + 200) sq- cm
`=2 xx 500 ` sq-cm
=1000- sq- cm
Hence the required total surface area = 1000 sq-cm