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Question 61
A is twice as good at writing a novel as B. Together they can finish writing the novel in 24 days. In how many days can A alone write the novel?
Solution
A is twice as good at writing a novel as B.
Let's assume the efficiency of B is 'y'.
the efficiency of A = 2y
Together they can finish writing the novel in 24 days.
Total work = $$(2y+y)\times\ 24$$
=Â $$3y\times\ 24$$
= 72y
Number of days taken by A alone to write the novel =Â $$\frac{72y}{2y}$$
= 36 days
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