The given equation of the plane is 3x + 4y- 5z - 60 = 0. It can be written in the form
x
20
+
y
15
+
z
−12
= 1 which meets the coordinate axes at the points A(20,0,0), B(0,15,0) andC(0,0,-12). The coordinates of the origin are O (0,0,0). Therefore, volume of the tetrahedron OABC is =