This is solid mensuration. I need help. Asap. Thankyou so much

A. 2.35 B. 31 Open with Google Docs D. 1.86 19. A pyramid with a square base has an altitude of 25 cm. If the edge of the base is 15 cm. Calculate the volume of the pyramid. A. 1785 cm3 B. 1875 cm3 C. 5178 cm3 D. 5871 cm3 20. A cubical container that measures 2 in on a side is tightly packed with marbles and is filled with water. All the 8 marbles are in contact with the walls of the container and the adjacent marbles are the same size. What is the volume of water in the container? A. 0.38 in3 B. 2.5 in3 C. 3.8 ins D. 4.2 in3 21. A pyramid has a square base of 8 m on a side and an altitude of 10 m. How many liters of water will it hold when full and inverted? A. 223,330 B. 203,330 C. 213,330 D. 233,330 22. Compute the surface area of the cone having a slant height of 5 cm and a diameter of 6 cm. A. 47.12 cm2 B. 25.64 cm2 C. 38.86 cm2 D. 30.24 cm2 23. The angle of a sector is 30 degrees and the radius is 15 cm. What is the area of the sector? A. 59.8 cm2 B. 58.9 cm2 C. 89.5 cm2 D. 85.9 cm2