Awall can be built by 6 men working 8 hours per day in 5 days. how many days will it take 4 men to build the same wall if they worked only 5 hours per day? ?

Total number of working hours = 6x8x5 = 240 hours 

Let x be the number of days required 

240 = 4(5)(x) 

x = 12 days

step-by-step explanation:

the multiplicative inverse of a fraction a/b is b/a. for the multiplicative inverse of a real number, divide 1 by the number. for example, the reciprocal of 5 is one fifth 1/5 or 0.2, and the reciprocal of 0.25 is 1 divided by 0.25, or 4.