Question

39. A bucket is in the form of a frustum of a cone of height 16 cm with radii of
its lower and upper circular ends as 8 cm and 20 cm respectively. Find the
cost of milk which can completely fill the bucket, at the rate of 40 per litre.
(Use a = 3.14)​

Answer 1

Step-by-step explanation:

Plzzz rake help of the attachment

Answer 2

Cost of one bucket of milk would be  ₹ 4180.

Step-by-step explanation:

Capacity or volume  = $\frac{\pi h}{3}[r_1^2+r_2^2+r_1\times r_2]$

here,

π = 3.14

h = 16 cm

r₁ = 20 cm

r₂ = 8 cm

Volume of the bucket = $3.14\times\frac{16}{3}[20^2+8^2+20\times 8]$

                                    = 16.7467 [400 + 64 + 160]

                                    = 16.7467 × 624

                                    = 10449.94 cm³

Converting the volume unit in liters = 10449.94 ÷ 100

                                                           = 104.4994 ≈ 104.50 liters

Rate of one liter of milk = Rs. 40.00

Cost of one bucket of milk = 104.50 × 40

                                            = ₹ 4180

Cost of one bucket of milk would be  ₹ 4180.

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