(1) volume = conical volume+cylindrical volume = 1/3×3. 14×(3÷2)? ×4×3/4+3. 14×(3÷2)? ×4=35.325 cubic centimeters ≈35 cubic centimeters

(2) 15× 10÷ 100 = 1.5m

Ask again if you don't understand. I wish you progress in your study and go up a storey still higher! (*^__^*)