Question

If a semi-circular disc has radius 10 cm then answer the following:-

a) Diameter of the semi - circular disc= __________________.
b) Circumference of the semi - circular disc= __________________.
c) Length of tape required to cover the edges of this semi-circular disc =_________________.
( Use Pi = 22/7)

Answer 1

Answer:

a. 20

b πr2

I know first part only

Answer 2

Answer:

CM of a uniform semicircular disc of radius R=3π4R from the centre

CM of a uniform semicircular ring of radius R=π2R from the centre

CM of a solid hemisphere of radius R=83R from the centre

CM of a hemisphere shell of radius R=2R from the centre

Step-by-step explanation:

PLS MARK AS BRAINLIEST