1.这本书有:
40/(1/3-25%)=480页
2.这本书有:
80/[1-(25%+1/3)]
=80/[1-7/12]
=80/(5/12)
=80*12/5
=192 页
3.这本书有:
56/(25%+1/3)
=56/(7/12)
=96 页
1.这本书有:
40/(1/3-25%)=480页
2.这本书有:
80/[1-(25%+1/3)]
=80/[1-7/12]
=80/(5/12)
=80*12/5
=192 页
3.这本书有:
56/(25%+1/3)
=56/(7/12)
=96 页