A pulley system has a velocity ratio of 4 and an efficiency of 90%, calculate:
The effort required to raise a load of 300 N by the system.

Explanation

To solve the problem of calculating the effort required to raise a load of 300 N using a pulley system with a velocity ratio of 4 and an efficiency of 90%, we can follow these steps:

### Step 1: Understand the Given Values
- Load (W) = 300 N
- Velocity Ratio (VR) = 4
- Efficiency (η) = 90% = 0.9

### Step 2: Use the Formula for Efficiency
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