Answer:
V=180
Step-by-step explanation:
V=1/4h﹣a4+2(ab)2+2(ac)2﹣b4+2(bc)2﹣c4
V=1/4h﹣a4+2(ab)2+2(ac)2﹣b4+2(bc)2﹣c4=1
4·15·﹣54+2·(5·5)2+2·(5·6)2﹣54+2·(5·6)2﹣64=180
