Asked by Victor

A sector of a circle of radius 7cm subtending an angle of 270 degree at centre of the circle is use to form a cone?
(A)find the base radius of the cone.
(B)calculate the area of the base of the cone.
Answered by Esther
Angle/360=length Of An Arc/pi*diameter
Answered by marvellous
what is the answer
Answered by aminu
it is very important for me
Answered by Esther
Yes
Answered by Emmanuel
Solve
Answered by Marvellous
270/360 *2*22/7*7=33
2πr=33
2*22/7=33
44/7*x=33
X=33*7/44
X=5.25
Answered by John
270/360
Answered by Vivian
(b)
πr^2
=22/7×21/4×21/4
=693/8cm^2 ~87cm^2
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