A 120° sector of a circle of radius 21cm is bent to form a cone. What is the base radius of the cone?

Similar Questions

The diagram above shows a cone with the dimensions of its frustrum indicated. Calculate the height o...

Find the length of a side of a rhombus whose diagonals are 6cm and 8cm ...

An arc of a circle of radius 6cm is 8cm long. Find the area of the sector...

Find ∫(sin x + 2)dx ...

Calculate, correct to three significant figures, the length of the arc AB in the diagram above. [Ta...

Five people are to be arranged in a row for a group photograph. How many arrangements are there if a...

If y = x$^2$ - x - 12, find the range of values of x for which y $\geq$ 0 ...

The sum of an interior angles of a regular polygon is 30 right angles. How many sides has the polygo...

The radius of a circle is given as 5cm subject to an error of 0.1cm. What is the percentage error in...

If $\frac{t}{1}$ = $\sqrt{(\frac{4\pi^2}{g}})$, what is the value of g when I = 4.5; t = 5 secs...