For the following questions answer them individually
If base diameter of a cylinder is increased by 50%, then by how much per cent its height must be decreased so as to keep its volume unaltered?
If (sec α + tan α) (sec β + tan β ) (sec γ + tan γ) = tan α tan β tan γ, then (sec α - tan α)(sec β - tan β ) (sec γ - tan γ) = ?
If two triangles are on the same base and between the same parallel lines then they will be