Question 1159053
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In 40 seconds, Lola paints 40/8 = 5 rubber duckies.


In the same time, Betty paints  40/10 = 4 rubber duckies.


Thus in 40 seconds, they both paint 5+4 = 9 toys.


It means that they need 40 seconds * {{{36/9}}} = 40*4 = 160 seconds 

          to paint 36 toys working together.    <U>ANSWER</U>
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Solved.