Question
Sonia and Riya decided to complete a piece of work
together. Sonia is capable of doing 9 units of work per day, whereas Riya can finish the complete task alone in 18 days. If the total work amounts to 108 units, how many days will they take working together?Solution
ATQ,
Let, the time taken by Sonia and Riya to do the work be ‘x’ days.
Units of work done by Riya in a day = 108 / 18 = 6 units
So, 108 / x = 9 + 6 = 15
108 = 15x
x = 108 / 15 or (36/5)
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