(1):100w*30min*60s=180000w,180000w=0.05kw
300r*0.05=15r所以是15转.
(2):60r/300r*1kw=3600000w*1/5=720000w
720000w/200w=3600s=6min所以是6分钟.
(1):100w*30min*60s=180000w,180000w=0.05kw
300r*0.05=15r所以是15转.
(2):60r/300r*1kw=3600000w*1/5=720000w
720000w/200w=3600s=6min所以是6分钟.