Question

2) x : 6 : : 5 : 3 then x

3) 30 labourers can built a wall in 9 days. If the same wall is to be built by 20 labourers how many days they will take to complete it?​

Answer 1

Answer:

2 ) x : 6 : : 5 : 3

Product of Extremes = Product of Means

x × 3 = 6 × 5

3x = 30

x = 30 / 3

x = 10

Answer 2

Answer:

2•

x : 6 : : 5 : 3

product of extremes = product of means

In the given ratio x and 3 are extremes and 6 and 5 are means. So putting in the formula

x❌ 3 = 6 × 5

3x = 30

x = 30 ÷ 3 = 10

3•

30 labourers can build a wall in 9 days.

1 labourer can build a wall in 9/30 days

20 labourers will build a wall in 9/30 ×20

180/30 = 6 days.

20 labourers will build a wall in 6 days.