S can complete a task in 50 days, T can complete it in 40 days and M can complete it in 30 days. S can work on all days of the week; T can work only on Monday, Wednesday, and Friday while M can work only on Saturday and Sunday. The work is started on Monday. In how many weeks it will be completed?
Between 4 to 5 weeks
Exactly 3 weeks
Between 3 to 4 weeks
Between 2 to 3 weeks
The radius of the base of a right circular cone is 7 cm and its curved surface area is 550 cm². The volume of the cone is: (Use π = \( \frac{22}{7} \))