Question

please answer for this question ​

Answer 1

Radius of circular base of cylinder, r = 7 cm

Height of cylinder , h = 20 cm

Volume of cylinder = πr²h

Volume of cylinder = π × 49 × 20

Volume of cylinder= 980π cm³

Radius of circular base of cone , r = 7 cm

Height of cone , h = 3 cm

Volume of cone

$=\frac{1}{3}\pi r^{2} h\\\\=\frac{\pi }{3}*49*3 \\\\=142\pi cm^{3}$

Total volume of vessel = Volume of cylinder - Volume of cone

So, Total volume of vessel = 980π - 142π

Total Volume of the vessel = 838·π cm³

Total Volume of the vessel = 2926 cm³

Rate of filling milk in the vessel = Rs. 20/litre

Total cost of milk to fill the vessel completely = 2926 × 20

Total cost of milk to fill the vessel completely = Rs. 58520