Question

solve question no. 2 ...i want it urgently tommorow is my test
solve it

Answer 1

hey.. here's ur solution

( use attachment )

hence 12 days is the answer

Answer 2

Given that 3 men can build a wall in 43 days.

Then 1 men's 1-day work =  1/43 days.

          3 men's 1-day work = 1/43 * 3.




Given that 4 women can build a wall in 43 days.

Then 1 women's 1-day work = 1/43.

          4 women's 1-day work = 1/43 * 4.



Now,


7 men and 5 women 1-day work = 7(1/43 * 3) + 5(1/43 * 4)

                                                      = 7/(1/129) + 5(1/172)

                                                      = 7/129 + 5/172

                                                      = 43/516

                                                      = 1/12.



Therefore it will take 12 days to build the wall.


Hope this helps!