A box with square base and height t is measured with the same possible error of measurement. Calculate the maximum possible error for its surface area if the length is 2 cm and the height is 6 cm and the percentage error of volume must be kept within ±1%.

The volume of a cone with height 49 cm, is 1848 cm'. Calculate the radius of the cone.

The diameter and the altitude of a right circular cone are 10 cm and 16 cm, 13. respectively. Find the maximum percentage error in the volume when these dimensions are in error ±0.60 cm.

A new condominium unit decided to place its reserve water tank below ground. The engineers excavated the land near the condominium building. Because of the water pipes from the other buildings nearby, the excavated land had the shape of a cone with diameter D, and height H. If the largest possible cylindrical tank will be placed in the excavated land, what is the percentage of the volume of the excavated land that will be occupied by the water tank.