Eqn y = -3/5 + 5
From the graph,the limits are x = 0 and x = 25/3.........
or they can be calculated alternatively by finding the x - intercept and consider the point (0,0) which is the point with the lowest x - value
V = pi ∫(5 - 3/5x)^2 dx
let u =5 - 3/5x..................du/dx = -3/5...............dx= -5/3du
By expressing the limits in terms of u
[o,25/3] = [5,0]
V = pi ∫u^2 (-5/3du)
=-5/3pi ∫u^2 du
= -5/9pi(u^3)
taking the limits [5,0]
v = 5/9pi*125
Volume = 625/9pi