Answer:
3.1
4.2
5.2
42
Step-by-step explanation: Just copy the other cone and find half of the diameter to find the radius the cones are congruent.
Answer:
3.215
Step-by-step explanation:
(1.99+2.99+3.99+3.89)÷4 (the amount of numbers being added)= 3.215
2100 would probably work if not 1500