Find the mass of a hollow sphere of a metal of internal diameter is 18cm and thickness of metal is 2cm.given the diameter is 7.5g/cm³
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Answer:
Step-by-step explanation:
volume of hollow sphere=
V=4/3*π(R³-r³)
Here r=9 cm,R=11 cm
V=4/3π(11³-9³)
=4/3π(1331-729)
=4/3π*602 cm³
=7568/3 cm3
mass= volume *density
=7568/3*7.5
=18920 gm
=18.920 kg
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