Question
Komal and Seema individually can complete a task in
‘5a’ hours and ‘7a’ hours respectively. If they together can complete (4/5)th of the work in 7 hours, then find the value of ‘a’.Solution
According to the question, => 7 x [(1/5a) + (1/7a)] = 4/5 => 7 x (12/35a) = 4/5 => a = 3
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