Bottom radius: r = 94.2/(2 * 3.14) =15cm2.

Bottom area: 3.14 *15 *15 = 706.5 cm2.

47 10+706.5=54 16.5cm^2=54 17cm^2

So we use iron sheet 5417cm 22.

Milk quantity: 706.5 * 50 * 4/5 = 28,260 cm3 = 28.26 dm3 = 28.26 l.

Milk quality: 28.26 *1.03 = 29.1078kg = 29kg.

So I can milk 29 kilograms.