Question

plzzzzzzzzzz plzzzzzzzzzzzzzz slove this​

Answer 1

Answer:

Step-by-step explanation:

number of work by men=1/x

number of work by boy=1/y

and by given the condition(1)

            2/x+7/y=1/4

             2a+7b=1/4

            8a+28b=1

condition(2)

4/x+4/y=1/3

4a+4b=1/3

12a+12b=1

now solve (1) and (2)

   (1) x 3 = 24a + 84b =3

   (2) x 2=24a + 24b  = 2

(subtract it)

-----------------------------------

                           60b=1

                                b = 1/60

                 therefore y = 60

now substitute b=1/60 in equation (2)

            12a + 12 x 1/60 =1

12a + 1/5 =1

60a + 1/5=1

60a+1=5

60a = 4

a=1/15

therefore x=15

Answer: MEN CAN COMPLETE IN 15 DAYS

AND BOY CAN COMPLETE IN 60 DAYS

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