Math, asked by 12Anjali, 1 year ago

alok takes 20 days to finish a work while shankar takes 15 days harish work twice as faat as alok in how many days al of them of them in same work

Answers

Answered by TooFree
5

Alok takes 20 days

⇒ 1 day = 1/20 of the work


Shanker takes 15 days

⇒ 1 day = 1/15 of the work


Harish is twice as fast as Alok:

⇒ 1 day = 1/20 x 2 = 1/10 of the work


In all the 3 worked together:

1 day = 1/20 + 1/15 + 1/10 = 13/60


Find the number of days needed to complete the work:

13/60 = 1 day

1/60 = 1 ÷ 13 = 1/13 day

60/60  = 1/13 x 60 = 4.6 = 5 days


Answer: They need 5 days to complete the work.

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