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⚫Ram and Raju can complete the plantation in a garden in 12 days. Ram alone can do this plantation in 20 days. In how many days will Raju complete this plantation if he walks alone.
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Answer:
this is correct answer
i have a great solution and easy-to-understand solution for you.......
in the above picture, I think you are unable to understand why 1/20+1/x = 1/12.
see actually when we use "=" sign. Remember, whenever you are putting = (equal to) sign it means both the sides (left hand side and right hand side) of equal to sign should be the same.
here , to the left of equal to sign, we have written the amount of work which Ram and Raju, both of them together performs in 1 day.
to the right of equal to sign, we have written the same thing, I mean, to the right of equal to sign, we have also written the amount of work which Ram and Raju, both of them together performs in 1 day.
since both are same or both are indicating a same fact, i.e., both of them are the amount of work which Ram and Raju, both of them together performs in 1 day, we use an equal to sign in between.
MORE SIMPLE WAY TO UNDERSTAND (BY USING SUBSTITUTION METHOD)
Amount of work completed by Ram and Raju together in 1 day = 1/12.
Amount of work completed by Ram and Raju together in 1 day = 1/20 + 1/x
so, 1/12 = 1/20+1/x (•.• Amount of work completed by Ram and Raju together in 1 day = 1/12, we put its value strictly using substitution method or placing/putting the value system)
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