Hi, hope this helps. Please take some time to read the explanations written in pencil. Also, as mentioned in the question, you need to be careful in leaving answer in terms of pi for the first part and to the nearest cm2 for the second part.
*If you qualify, the Free 360 Tutoring Program will be extended to you at no extra charge.
On top of the tutor you are getting, ManyTutors will provide unlimited free tutors to help you with any questions you may have for other subjects. Just snap a photo of your homework, post, and someone will provide the solution for free.
You will get a complimentary premium account on Ask ManyTutors that allows you to ask English, Chinese, Malay, Math, Science, Geography and History homework questions free of charge.