Please help in Further Mathematics, quickly...

[rexsun]

Help please!!!!!!
Q1:Find the length of the arc of the parabola x=at^2, y=2at, between the points(0,0) and (ap^2,2ap)
Q2: Find the length of the arc of the cycloid x=a(t+sin t), y=a(1-cos t), between the points t=0 and t=pi

Does anybody feel the final integral hard to evaluate?

 

[rexsun]

I just meet another one... and haven't got a clue...
Find the area of the surface generated by rotating about the x-axis for curve y=e^(3x), from x=1 to x=4