Hi could you answer the single question in the attachment.
show full working out.
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Find volume of smal and big cone big-small=frustum V=1/3(hpir^2) 30=diameter of bic cone d/2=r 15=radius of big cone wat is radius of smal cone? height:radius=height:raidus 40:15=20:x x=7.5 small radius=7.5 now we have small volume= (1/3)20pi7.5^2= (1/3)20pi57.25= (1/3)1145pi= 381.66666666pi big volume= (1/3)40pi15^2= (1/3)40pi225 (1/3)9000pi 3000pi minus big-small= 3000pi-381.6666666pi= 2618.3333333333pi aprox pi=3.141592 8225.33333333333 8225.33 cm^3

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