A cuboid has a volume of $64000$ $c m^{3}$ . If the ratio of its sides are $1 : 2 : 4$ , then the largest side is

40

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60

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64

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80

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Solution

The correct option is D $80$ cm
Let the sides be $x$ , $2 x$ and $4 x$ .
Volume of cuboid $= x . 2 x . 4 x = 64000$
$x^{3} = 8000$
$∴ x = 20$ cm
$∴$ largest of the largest side $= 4 x = 80$ cm

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A cuboid has a volume of 64000 cm3. If the ratio of its sides are 1:2:4, then the largest side is

The correct option is D 80 cmLet the sides be x, 2x and 4x.Volume of cuboid =x.2x.4x=64000x3=8000∴x=20 cm∴ largest of the largest side =4x=80 cm

A cuboid has a volume of $64000$ $c m^{3}$ . If the ratio of its sides are $1 : 2 : 4$ , then the largest side is

The correct option is D $80$ cm
Let the sides be $x$ , $2 x$ and $4 x$ .
Volume of cuboid $= x . 2 x . 4 x = 64000$
$x^{3} = 8000$
$∴ x = 20$ cm
$∴$ largest of the largest side $= 4 x = 80$ cm