Answer :

Given: Radius of cone, R = 10cm

To compare: Volumes of two parts

From the figure, we can see that cone is divided into two equal parts by the axis. So,

In ΔAQD and ΔAPC, we have

AQD =APC [both are 90°]

DAQ =PAC [common]

ΔAQD ~ ΔAPC [by AA similarity criterion]

So, radius

Now, the volume of frustum

Comparing the volume of the frustum and cone

Volume of two parts are in 1 : 7

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