Question

A house was painted in blue and white. 15 litres of white paint was used. What volume of blue paint was used, when the ratio of the blue region to the white region is 3:5​

Answer 1

As red and blue paints are n the ratio of

3

:

4

,

for every

4

liters of blue paint, we need

3

liters of red paint

this means for every

1

liter of blue paint, we need

3

4

liters of red paint

and for

6

liters of blue paint, we need

3

4

×

6

liters of red paint

i.e.

3

4

2

×

6

3

=

9

2

=

4.5

liters of red paint.