In 80 L mixture, milk:water = 5:3. Water added to make ratio 1:2: MCQ with Answer and Explanation

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In 80 L mixture, milk:water = 5:3. Water added to make ratio 1:2:

A. 60 L

B. 70 L

C. 90 L

D. 80 L

Answer: Option B

Solution (By JKSSB Mock Tests)

Milk=50 L, water=30 L. For milk:water = 1:2, water needed=100 L, add 70 L.

This question belongs to: Maths Percentage

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Question #1

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The present value of a machine is 7,290. If it depreciates by 10% yearly, what was its value 3 years ago?

A. 12000

B. 10000

C. 11000

D. 9000

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Correct Answer: Option B

Explanation:
V_past = 7290 / (0.90)^3 = 7290 / 0.729 = 10000.

This question belongs to: Maths Percentage

Question #2

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A man gave 25% to wife, 20% of remainder to son, 25% of remainder to daughter, rest Rs. 9000 to charity. Total amount:

A. 22000

B. 18000

C. 24000

D. 20000

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Correct Answer: Option D

Explanation:
Wife 25%, left 75%. Son 20% of 75%=15%, left 60%. Daughter 25% of 60%=15%, left 45% = 9000 → total = 20000.

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Question #3

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60% of a number is 180. The number is:

A. 250

B. 400

C. 300

D. 350

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Correct Answer: Option C

Explanation:
0.6x = 180 → x = 300.

This question belongs to: Maths Percentage

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