Question

A container open at the top is in the form of a frustum of a cone of height 24cm with radii of its lower and upper circular ends as 8 &20 CM respectively find the cost of milk which can completely fill the container at the rate of Rs 21 per litre
(Take Pie =22/7)

Answer 1

Answer:

Step-by-step explanation:

h=24 cm

r1=8 cm

r2=20 cm

volume=1/3×22/7×24<8²+20²+8×20>

           =1/3×22/7×24<64+400+160>

          =1/3×22/7×24<624>

          =18304 cm³

          =18304/1000 liter  <1000 cm³=1 liter>

          =18·304 liters

∴ total cost = 18.304 × 21

                  = 384.384 rupees