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# A block and tackle system has 6 pulleys. If the efficiency of the machine is 60%...

### Question

A block and tackle system has 6 pulleys. If the efficiency of the machine is 60%, determine its mechanical advantages

### Options

A) 12.0

B) 10.0

C) 3.6

D) 1.8

M.A = $$\frac{Z \times V.R}{100} = \frac{60 \times 5}{100} = 3.6$$
• M.A = $$\frac{Z \times V.R}{100} = \frac{60 \times 5}{100} = 3.6$$