Kumar suffered severe head injuries and was rushed to a nearby private hospital where doctors declared him brought dead on arrival.
According to eyewitnesses, the tanker was speeding and the driver was in an inebriated state.
After hitting Kumar from behind, the tanker driver fled from the spot.
"We have got the registration number of the killer vehicle and the driver would be arrested soon," said a senior police officer.
A case has been registered against the driver.