delay in pinging www.google.com but faster with its actual ip

delay in pinging www.google.com but faster with its actual ip

When I try pinging www.google.com, its dead slow. It takes 4-8 seconds for
the first packet to be sent. But when i ping its actual ip its really
fast. I feel it has something to do with the dns. Can anyone help me how
to resolve this issue?
PING www.google.com (173.194.126.49) 56(84) bytes of data.
64 bytes from 173.194.126.49: icmp_req=1 ttl=63 time=2.34 ms
64 bytes from 173.194.126.49: icmp_req=2 ttl=63 time=2.76 ms
64 bytes from 173.194.126.49: icmp_req=3 ttl=63 time=2.50 ms
64 bytes from 173.194.126.49: icmp_req=4 ttl=63 time=3.00 ms
64 bytes from 173.194.126.49: icmp_req=5 ttl=63 time=2.82 ms
64 bytes from 173.194.126.49: icmp_req=6 ttl=63 time=3.34 ms
64 bytes from 173.194.126.49: icmp_req=7 ttl=63 time=3.02 ms
8 packets transmitted, 8 received, 0% packet loss, time 99656ms
While pinging the actual ip
PING 173.194.126.49 (173.194.126.49) 56(84) bytes of data.
64 bytes from 173.194.126.49: icmp_req=1 ttl=63 time=2.75 ms
64 bytes from 173.194.126.49: icmp_req=2 ttl=63 time=3.38 ms
64 bytes from 173.194.126.49: icmp_req=3 ttl=63 time=4.45 ms
64 bytes from 173.194.126.49: icmp_req=4 ttl=63 time=4.91 ms
64 bytes from 173.194.126.49: icmp_req=5 ttl=63 time=4.21 ms
64 bytes from 173.194.126.49: icmp_req=6 ttl=63 time=3.89 ms
64 bytes from 173.194.126.49: icmp_req=7 ttl=63 time=2.98 ms
64 bytes from 173.194.126.49: icmp_req=8 ttl=63 time=3.90 ms
--- 173.194.126.49 ping statistics ---
8 packets transmitted, 8 received, 0% packet loss, time 7011ms