Q$\mathrm{.}4)$

$(4$ points$)$

Consider a computer system with the following memory access

time specifications:

$Tc=50ns$

$Tm=1000ns$

where Tc and Tm are the cache memory and main memory

access times respectively.

If the effective access time for this entire system is $30\%$ more

than the cache access time, what is the hit ratio going to be in

such a situation?