21
A work can be completed by 28 women in 36 days. If 4 women leave after working for 18 days, then how many days will be needed to complete the remaining work?
- A24
- B21
- C27
- D25
Answer not set
Discussion 1
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CCommunity
Number of person days required = 28 × 36 = 1008
Number of person days spent = 28 × 18 = 504
Number of people left = (28 - 4) = 24
Using the formula for person days 1008 = 504 + 24x
⇒ 24x = 1008 - 504 = 504
⇒ x = 504/24 = 21 days
∴ Number of days needed to complete remaining work = 21
Number of person days spent = 28 × 18 = 504
Number of people left = (28 - 4) = 24
Using the formula for person days 1008 = 504 + 24x
⇒ 24x = 1008 - 504 = 504
⇒ x = 504/24 = 21 days
∴ Number of days needed to complete remaining work = 21