The radius of the earth = 6.4 * 10 cubic km, the volume of the earth, π = 3, v = 4 / 3 π r cube

The radius of the earth = 6.4 * 10 cubic km, the volume of the earth, π = 3, v = 4 / 3 π r cube

V=(4/3)πr³
=(4/3)π(6.4*10³)³
=(4/3)π*262.144*10^9
=1048.576*10^9
=1.048576 * 10 ^ 12 cubic kilometers

The volume of the earth is about 10 to the 12th cubic kilometer. The volume of a grain of sand is 1 cubic millimeter. How much sand can the earth hold?

1 cubic kilometer = 18 cubic millimeter of 10
Come on, do it yourself

The volume of a basketball is 9850 cubic centimeters, and the radius r of the basketball (the volume of the ball v = 4 / 3 π R3, π = 3.14, the result is accurate to 0.1 cm) is calculated

The volume of the ball v = 4 / 3 * 3.14r cube R ^ 3 = 3 * 9580 / (4 * 3.14) = 28740 / 12.56 = 2288.21656 answer: 13.2