Question

10 people who build at the same rate can frame a house in 6 days. What fractional part of a house can 4 people frame a house in 3 days?
a. 1/2
b. 1/3
c. 1/4
d. 1/5
e. 1/6

Answer 1

10 people who build at the same rate can frame a house in 6 days. That means it will take one person $10\times6=60$ days to finish the house.

Which means that it will take 4 people $\frac{60}{4}=15$ days to finish the house.

So, the fractional part of the house 4 people can frame in 3 days will be $\frac{3}{15}=\frac{1}{5}$

Thus, Option D is the correct answer.