Answer :
(a) Amount of milk one container can hold = Volume of frustum
As we know
volume of frustum of a cone
Where, h = height, r1 and r2 are radii of two ends (r1 > r2)
For given container,
Radius of top, r1 = 40 cm
Radius of bottom, r2 = 20 cm
Height of each container, h = 30 cm
Using these values,
We have.
Now,
1000 cm3 = 1 L
⇒ 88000 cm3 = 88 L
No of container required 
(ii) Cost = Amount of milk × Rate of milk
Cost = 880 × 35 = 30800 RS
(iii) The organization empathies with the victims and aspires to help the needy ones, the agency portrays the values of kindness and humanity.
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