Emma is twice as fast as olive.if olive,alone,can paint a wall in 12 minutes ,how much time would both of them , together,take to paint the same wall?
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Answer:
Emma and Olive will do the work in 6 second and 6 second
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Answer:
Total time taken by both of them 4 minutes.
Given:
Time taken by Olive to paint the wall = 12 minutes
Efficiency of Emma = 2 x efficiency of Olive
To Find:
Find the time taken by them together to paint the wall
Explanation:
Let the total work be 12 units
therefore the efficiency of Olive = 12/12
=1 unit /minute
according to the question,
Efficiency of Emma = 2 x efficiency of Olive
therefore, efficiency of Emma = 2x1
= 2 units / min
total efficiency of both of them together = efficiency of Emma + Efficiency of Olive.
Efficiency of both of them = 1 +2 = 3 units / min
So time taken = 12/3 = 4 minutes
Total time taken by both of them 4 minutes.
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