Question 18
Ratio, Percentages and RatesIf (4m + 3n)/(4m − 3n) = 5/2, find the ratio m:n
- A.7 : 4
- B.4 : 3
- C.3 : 4
- D.4 : 7
Show the answer and explanation
Answer: A (7 : 4)
Explanation
8m + 6n = 20m − 15n, so 21n = 12m and m : n = 21 : 12 = 7 : 4.
If (4m + 3n)/(4m − 3n) = 5/2, find the ratio m:n
Answer: A (7 : 4)
8m + 6n = 20m − 15n, so 21n = 12m and m : n = 21 : 12 = 7 : 4.