Ill answer it for you 150 cubic meters
Step-by-step explanation:
V = 1/2 a x c x h
1/2 * 7*12*18 = 756 yd ^3
This answer would be 21 because you’d just do 15 increased by 40% which gave me 21
301.6=3.14×4×h/3
301.6=12.56×h/3
3770/157=h/3
72 6/157=h. Hope it help!