1. How many days will it take for Party A and Party B to complete this project alone?
1/ 12* 1/3= 1/36
1/ 12*2/3= 1/ 18
It takes 18.36 days for Party A and Party B to complete this project independently.
2 If Party A needs daily engineering expenses in 650 yuan and Party B needs daily engineering expenses in 400 yuan, which scheme should be chosen for construction from the perspective of saving money?
18 * 650 =11700 yuan.
36*400= 14400 yuan
Choose one11less than 700 yuan 14400 yuan.