Three fourth of one-fifth of a number is 60. The number

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Three fourth of one-fifth of a number is 60. The number is ?

1. 300
2. 400
3. 450
4. 1200

Correct Option: B

Let the required number be N.
So 3/4 x 1/5 x N = 60
⇒ 3N / 20 = 60
∴ N = 400