Correct Answer - Option 3 : 10

**Given****∶**

Number of taps = 8

Time = 80

**Formula used****∶**

M_{1} T_{1} = M_{2} T_{2}

Where M and T represents number of taps and time**. **

**Calculation****∶**

8 × 80 = M_{2} × 64

⇒ M_{2} = (8 × 80)/64

⇒ M_{2 }= 10

∴ 10 taps are required to fill a container in 64 minutes.