Question

If it takes eight men ten hours to build a wall, how long would it take four men to build?

Answer 1

20 hours....

here is your answer...

Explaination -

Because the time taken by eight men is 10 hours so, if the number of men decrease then the number of Hour increase.

here,

the number of men be halfed,

so, the number of Time be double.

so,

the time taken by 4 men to build a wall is 10×2 = 20 hours.