Question

乒乓球桌的问题啊,谁会,大虾帮忙`````````````

Answer 1

1.表面积=2(2.74*1.25+1.25*0.025+0.025*2.74)=7.0495

共用0.5*7.0495*2=7.0千克

2.题目错了,应是立方分米

体积=2.74*1.25*0.025*1000

质量=2.74*1.25*0.025*0.4*1000=34.25

约34.3立方分米