In a chemistry lab two beakers A and B contain 62% and 84% of spirit…
2017
In a chemistry lab two beakers A and B contain 62% and 84% of spirit respectively. If two liters from A is mixed with 4 liters of B, the ratio of spirit and water in the resulting mixture is:
- A.
58 : 19
- B.
17 : 19
- C.
23 : 7
- D.
17 : 21
Attempted by 29 students.
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Correct answer: C
Spirit in beaker A:
62% of 2 litres
= (62/100) × 2
= 1.24 litres
Water in A:
= 2 − 1.24
= 0.76 litres
Spirit in beaker B:
84% of 4 litres
= (84/100) × 4
= 3.36 litres
Water in B:
= 4 − 3.36
= 0.64 litres
Total spirit:
= 1.24 + 3.36
= 4.60 litres
Total water:
= 0.76 + 0.64
= 1.40 litres
Required ratio:
= 4.60 : 1.40
= 46 : 14
= 23 : 7