Use the method of cylindrical shells to find the volume v generated by rotating the region bounded by the given curves about y = -7. y=x^2, x=y^2.
as we know that if two parallal line cut by a transversal opposide angles are same and corisponging angle are same so < 1 and< 8 are same means< 1=< 8 so we can write 2x+35=10x-85
10x-2x=85+35 8x=120 x=120/8 x=15 ans is d. 15
i'm assuming it's looking for the missing length, which should be 4cm
hope this !