Time & Work · Question 14 · Hard
Time & Work question 14
Gita is 50% more efficient than Hema. Hema alone can finish a job in 45 days. Gita works alone for the first 10 days, then Hema joins her. How many days in total does the job take?
- 24 days
- 22 days
- 18 days
- 20 days
Answer and explanation
Answer: B. 22 days
Explanation: Gita's rate = 1.5 × 1/45 = 1/30, so in 10 days she does 1/3. The remaining 2/3 at 1/30 + 1/45 = 1/18 per day takes 12 days. Total = 10 + 12 = 22 days.
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