A conical steel part has a bottom radius of 10 cm and a height of 9 cm. If each cubic centimeter of steel weighs 7.8 g, how many kg does the part weigh? Keep the whole kilogram

A conical steel part has a bottom radius of 10 cm and a height of 9 cm. If each cubic centimeter of steel weighs 7.8 g, how many kg does the part weigh? Keep the whole kilogram

The volume is
10 × 10 × 3.14 × 9 × 1 / 3 = 942 (cm3)
The weight is
7.8 × 942 = 7347.6 (g) = 7 (kg)