Anu is four times as good as Binni in completing a task. Together they finish the same task in 7 hours. In how many hours will Anu alone complete the task?

Options
a) 22
b) 35/4
c) 31/4
d) 24

Solutions

As per question

Effciency of Anu = 4m
Effiency of Binni = 1m
Effiency of Both = 5m
Total work = 7 x 5 = 35
Anu alone complete task = 35/4

Ans: b) 35/4