A coin of diameter 1 cm. is rolling on the periphery circle of diameter 24 cm, how many rounds will this coin need to revolve to complete one full big circumference?
I think it would be 24 rounds since 1 round of a small circle is a distance equal to its circumference, hence:
(π × 24) / (π × 1) = 24
D/d, 24/1= 24 Nos.
A cylindrical vessel of diameter 4cm is partly filled with water and 300 lead balls are dropped into it which increases its level by .8 cm. What is the diameter of each ball?
If a piece of wire 40 cm long is bent into a arc of a circle subtending an angle of 60 degree at the center, then what is the radius of the circle?
