Aarushi and Devesh are making a painting. Aarushi can complete the painting in in 30 minutes .Both Arushi and Devesh can complete the painting together in 20 minutes .They work together for 10 minutes and they have a quarrel at this point ,Aarushi goes away. In how many minutes Devesh will finish the painting.
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20 minutes please mark me as brainlist and please follow me
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