Find the volume of the composite solid:

Volume of a cylinder with a radius of 13 in and height of 30 in

Me because some of question i don’t understand

Oscar and julie ashton are celebrating their 15th anniversary by having a reception hall. they have budgeted $4,500 for their reception. if the reception hall charges a $90 cleanup fee plus & 36 per person, find the greatest number of people that they may invite and still stay within their budget.