15 men can build a wall in 20 days. How long will 25 men take to build the
same wall?​

Step-by-step explanation:

no of men                                no of days

15                                             20

25                                             let be x

it is in indirect proportion

15/25=x/20

do cross multiplication

25*x=20*15

25x=300

x=300/25

x=12

therefore ot will take 12 day to complete the same wall by 25 men.  

answer: the anser is 3

step-by-step explanation:

c- 2o is equal to 9

actually your concept is wrong

step-by-step explanation:

150% of x =300

150x=300×100

x=(300×100)÷150

x=200