word problem with ratio proportion

Question

15 employers working 10 hours per day built a 180m long canal for 12 days. How many days need 32 employers working 8 hours per day to built a 600 m long canal?

Answer 1

Hint:

• How many hours to 15 employees need to dig the 180m canal?
• Therefore, how many hours would just one employee need?
• Therefore, how long a canal does one employee dig in one hour?
• Therefore, how long a canal do 32 employees dig in one hour?
• Therefore, how many hours do 32 employees need to dig 600m of canal?

Answer these questions one by one, tell me where you get stuck.