CPU Temp and Fan Speed

Hi
According to SMC Fan Control and iStat my CPU is running at 74C currently and often 90C under light load with associated fan speed of 6200 rpm. I have checked activity monitor and very little load on CPU jsut safari and Activity Monitor have any significant usage ( 10% ish). Is this a 'normal' CPU temp and if not are there any ways to check cooling or in crease cooling, ultimately to keep the fan low and noise down,battery life up??
many thanks

thanks for the response.
'All processes' is selected - showing 50-70% CPU idle. MacBook has good ventilation, sitting on a hard table. I upgraded the HD a while ago, to a 7200 rpm 320GB unit, would this make a difference?

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