Math

A does 20% less work than B .If a complete
a piece of work in 7& 1/2 hours then B can do it in
options- 5,5&1/2,6,6&1/2
plz solve without using x and y method

asked by Apoorv
  1. B = 7.5 - 0.2*7.5 = 6h.

    posted by Henry

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