- 20
- 25
- 30
- 32

Option 1 : 20

**Given:**

M_{1} = 2 typist

T_{1} = 1 hour = 60 min

W_{1} = 16 pages

T_{2} = 30 min

W_{2} = 80 pages

**Formula Used:**

(M_{1}T_{1})/W_{1} = (M_{2}T_{2})/W_{2}

Where,

M_{1} and M_{2} = Number of persons

T_{1} and T_{2} = Time

W_{1} and W_{2} = Work done

**Calculation:**

According to the question, we have

(2 × 60)/16 = (M_{2} × 30)/80

⇒ (2 × 2) = M_{2}/5

⇒ M_{2} = 20 typist

**∴ 20 typist can type the 80 pages in 30 min.**

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