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when there is no branch...in pipeline manner all instreuctions wii come out every one cycle letter.

ID O E W                              
  F ID O E W                            
    F ID O E W                        

SO TIME =.7*1*4 because clock cycle time is 4 ns.

now it is saying that cpu will not fetch new instruction in case of branch until last branch did not get complete, that means in branch case 

F ID O E W                    
          F ID O E W          
                    F ID O E W

SO after every 5 cycle we are getting our result so in this case .3*5*4 where  clock cycle time is 4 ns.

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here for NON branch CPI=1 as per ideal condition 

for branch instructions CPI=5 as per statments ....so solution wll be  ...

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kirtikanwar asked Jan 15, 2017
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How to solve this question?