Question

Pranav is constructing a building. He finishes
1/16
of the construction in 21/4
weeks. In how many days
will he finish constructing the building?

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Answer 1

Step-by-step explanation:

Arithmetically, it would take half the time — double the manpower would halve the time required for completion.

But arithmetic/mathematics is one thing, real life is another.

If it takes 10 men to complete something in 40 days, putting in an extra 10 men is going to shave some time off — but not halving it in my general experience.

It just depends on the nature of the work and how the work is handled or supervised.