Made easy test series

Question

Consider a single level cache with an access time of 2.5ns, a line of 64B and a hit ratio of 0.95. Main memory uses a block transfer capability that has a first word i.e. 4B access time of 50ns and after that 5ns for each word access. If cache waits until block is copied from MM to the cache and then access from cache,the access time is________(in ns) (upto 3 decimal places)

Comments

 i guess the searching time in cache to find out whether its a hit or a miss is considered to be negligible unless it is specified in question. So here formula should be:

But we generally take Cache access time in case of miss , but in write through policy we don't specifically take cache access time because we consider it to be a parallel write .

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Ohk i get it ,thanks

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sorry I didn't read the comment

so

Access time= 0.95(2.5)+ 0.05(2.5+50+15*5+2.5)=8.875ns  this approach is correct right  ???