Q 41. A hinged gate of length 5m, inclined at
with the horizontal and with water
mass on its left, is shown in the figure below. Density of water is 
. The
minimum mass of the gate in kg per unit width (perpendicular to the plane of
paper), required to keep it closed is
(A) 5000
(B) 6600
(C) 7546
(D) 9623
Answer: (D )
Explanation:
