Question 107

If two equal cubes of side 7m are joined together to form a cuboid. Then the total surface area of that cuboid. in square meters. is

Solution

As per the given question,

We joining two cube, which formed an cuboid.

Hence new length of the cuboid $$=7+7=14cm$$

Breadth of cuboid$$=7cm$$

And height of the cuboid$$=7cm$$

Hence, the total surface area of the cuboid $$=2(l\times b+b\times h+h\times l)$$

$$\Rightarrow 2(7\times 14+7\times 7+7\times 14)=2(98+49+98)=490$$

$$\Rightarrow =490m^2$$

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