What is the most efficient way to achieve the result for question attached?
Answer: B
Thanks,
K
GMATPrep Test 1 #2_PS Rates Basic #21
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Let the rate of 1 machine = xkwah wrote:What is the most efficient way to achieve the result for question attached?
Answer: B
Thanks,
K
Then rate of 10 machines = 10x
It is given that work = 16 * 10x
Let time taken by 8 machines = T
Then same work = 8x * T
So, 16 * 10x = 8x * T implies T = 20 hrs
The correct answer is B.
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