If typists can type two pages in five minutes ,how many typi
2个回答
少了一个关键的单词哟,
If two typists can type two pages in five minutes ,how many typists will it take to type twenty pages in ten minutes
A 10
If two typists type 2 pages in 5 minutes
In 1 minute they will type 2/5pages
therefore 2 typists type 2/5 pages in 1 minute
1 typist will type (2/5)/2 pages in 1 minute(he will type less)=1/5 pages.eqn 1
x typists type 20 pages in 10 minutes
in 1 minute they will type 20/10 pages=2 pages
therefore x typists type 2 pages in 1 minute
1 typist will type 2/x pages.eqn 2
equating eqn 1 and 2 gives 2/x=1/5
therefore x =10 typists
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