# Time taken to access cache is 100ns and to access memory is 1000ns.Hit ratio given. Find the average access time

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#### Amit Dhamija

• Aug 15th, 2005

hitratio * (100+1000)+(1-hitratio)+(100+1000+1000)

#### sameergupta Profile Answers by sameergupta

• Sep 28th, 2005

Average access time will be

[(Hit ratio*1000)+((1-Hit ratio)*(1000+100))]/(1000+100)

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#### Rashi Bhardwaj

• Nov 29th, 2005

The Formula is-

tch+tmh

ie 100*hit ratio +1000 *hit ratio

N i m dead sure abt this answer

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#### hari

• Dec 6th, 2005

Taverage = (1 - H) x Tslow + H x Tfast

where T stands for access time.  You could rearrange this to express what the hit ratio is in terms of the 3 access times

H = (Tslow - Tave)/(Tslow - Tfast)

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#### Shadab Rabbani Profile Answers by Shadab Rabbani

• Oct 7th, 2009

100 + (1-H)1000
Where H=Cache hit ratio

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#### jainrani Profile Answers by jainrani

• Mar 19th, 2010

Hit time + (1-H) * Miss panelty
100 + (1-H) * ( 100 + 1000)
=100 + (1-H)* 1100

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