Question

A does 20% less work than B. If A can finish a piece of work in 7 hours.In how
many hours can B finish it?​

Answer 1

Answer:

9 hours

Step-by-step explanation:

since A does 20 % less... this becomes 100 - 20 = 80

hence to get how long B worked for

use cross multiplication :

         80    :     7

       100      :    x

where x is the time B works for

80x = 700

hence x  =8.75

to the nearest whole number is :

hence B works for 9 hours

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