Question

arushi and divesh are making a painting. Arushi can complete the painting in 30 minutes. Both arushi and divesh can complete the painting together in 20 minutes. they work together for 10 minutes and they have a quarrel. at this point arushi goes away and in how many minutes divesh can finish the painting?

Answer 1

Answer:

30 Minutes

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Step-by-step explanation:

A - Arushi D - Divesh , P - Painting

30 A = P

20A + 20D = P

10A + 10D = 1/2(20A+20D) = P/2

so half painting is completed

Divesh to complete = P-P/2 = P/2

20A + 20D = 30A

20D = 10A

A = 2D

30A = P

30 (2D) = P

60 D = P

60D/2 = P/2

30 D = P/2

so Divesh will take 30 minutes more to finsh painting