That is quite high. Someone is running too many php/perl script or may be mysql putting too much load. How many websites you are running out of this box? Do you see anything unusal in /tmp directory?
What is the output of vmstat command?
Can you paste output for following directives httpd.conf?
Code:
Timeout
KeepAlive On
MaxKeepAliveRequests
KeepAliveTimeout
MinSpareServers
MaxSpareServers
StartServers
MaxClients
MaxRequestsPerChild