Sunny and rainy days

Solution: If there are X sunny days and Y rainy days during the construction period, the efficiency of Party A is 1/29 in sunny days,1/29 in rainy days (1-kloc-0//5) = 4/145 in sunny days, and the efficiency of Party B is 65438 in sunny days.

According to the meaning of the problem, the equation is obtained:

x/29+4y/ 145= 1

x/32+9y/320= 1

To solve this system of equations, x=5 y=30.

That is, 5 days in sunny days and 30 days in cloudy days.