Painters

The first team of painters would paint bridge in 15 days, the second in 10 days. After 3 days of working together second team goes out and continue only first team. How many days took second team to finish painting the bridge?

Result

x =  7.5

Solution:

Solution in text x =

(1/15+1/10)*3+1/15x = 1

2x = 15

x = 15/2 = 7.5

Calculated by our simple equation calculator.







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