Question

Salim took coal, cement and sand and mixed them in the ratio 6 : 7 : 9 . But his brother wants a ratio of 8 : 6 : 9 for the same . So Salim added ‘a’ grams of sand and ‘b’ grams of coal to get the desired ratio. Find the ratio of b : a?

Answer 1

Answer:

Find an answer to your question sand and cement are in the ratio 6:5 in a ... kg. how much sand must be added to the mixture so as to make the …

5x= 6(671 kg -x) 5x= 4026 kg - 6x 11x = 4026 kg x = 366 kg, 366 kg of sand need to be added

Answer 2

Answer:

20:9

Step-by-step explanation:

old ratio- 6x:7x:9x

New ratio- 8y:6y:9y

equation,

6x+b=8y.....(1)

7x=6y..........(2) we get y=7x/6

9x+a=9y.....(3)

Put 2nd equation in 1 & 3,

you will get

b=20x/6

a=9x/6

thus b:a- 20:9