Make a rule between the number of blades required and the number of fans(say n) in a hall?

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Solution

As given that there are $3$ blades required for a fan.

Hence,
No. of blades required for $n$ fans in a hall $= 3 \times n \Rightarrow 3 n .$

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Make a rule between the number of blades required and the number of fans(say n) in a hall?

As given that there are 3 blades required for a fan.Hence,No. of blades required for n fans in a hall =3×n⇒3n.

As given that there are $3$ blades required for a fan.

Hence,
No. of blades required for $n$ fans in a hall $= 3 \times n \Rightarrow 3 n .$