Question

A carpenter take 8hoursto make an armchair while his assistant take 12 hour to do same job working together how long will they take to fit 22 celling fans ?​

Answer 1

Answer:

A carpenter takes 8 hours to make an armchair while his assistant takes 12 hours to do the same job.

Let A is time taken by carpenter and B is time taken by assistant .

now when they are working together ,

time taken = AB/(A + B)

Here, A = 8 hours and B = 12 hours

so, time taken = 8 × 12/(8 + 12) = 96/20 =4.8 hrs

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