JEE Mains Model Paper 8

A 3.6 m long vertical pipe is filled completely with a liquid. A small hole is drilled at the base of thepipe due to which liquid starts leaking out slowly. This pipe resonates with a tuning fork. The first tworesonances occur when height of water column from base is 3.22 m and 2.34 m respectively. The areaof cross−section of pipe is