In summer vacation Gori goes brilla panaltroeium with her parents every tickets rs120per person there is 40%discount on ticket for a group of 25or more student then Gori enters the place see is very surprised to see the shape she co relate it with third shape she asked about available seats and radius of the panaltroeium and found that there are thousand seat and radius is 15m all the seats are full on that day now gori is thinking how much air I'm getting here

(1) help Gori to find the quantity of air she is inside the panaltroeium

(2) Gori school management dicide to take all student to the place if there are 45student each class from 1to10.then how much money they have to pay had ticket counter.