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A tank can be filled in 30 minutes by 20 pumps. If five pumps go out of order, what time will be taken by the remaining pumps?
  • a)
    40 mins
  • b)
    38 mins
  • c)
    32 mins
  • d)
    30 mins
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
A tank can be filled in 30 minutes by 20 pumps. If five pumps go out o...
Answer: Option A
Explanation :We know, 
Time ∝ 1/no. of pumps
∴ Time × (Number of pumps) = constant.
⇒ 20 × 30 = 15 × x
⇒ x = 20 × 30/15 = 40 mins
Hence, option (a).
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Most Upvoted Answer
A tank can be filled in 30 minutes by 20 pumps. If five pumps go out o...
Given Information:
- A tank can be filled in 30 minutes by 20 pumps.

Calculation:
- Each pump fills $\frac{1}{30 \times 20}$ of the tank in 1 minute.
- When 5 pumps go out of order, the number of working pumps becomes 15.

Time taken by remaining pumps:
- The remaining 15 pumps will fill the tank in $\frac{1}{30 \times 15}$ of the tank in 1 minute.
- So, the tank will be filled by the remaining pumps in 30 minutes.
Therefore, the correct answer is option A) 40 mins.
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A tank can be filled in 30 minutes by 20 pumps. If five pumps go out of order, what time will be taken by the remaining pumps?a)40 minsb)38 minsc)32 minsd)30 minsCorrect answer is option 'A'. Can you explain this answer?
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