A gardener trims ⅓ of a hedge in 2 hours. If a second gardener joins with equal speed, total time for the whole hedge?
Correct answer: B. 3 hrs
- A. 2.5 hrs
- B. 3 hrs
- C. 3.5 hrs
- D. 4 hrs
Explanation
Each gardener trims ⅓ of the hedge in 2 hours, so their rate is ⅓ per 2 hours, or 1/6 of the hedge per hour. Together, their combined rate is 1/6 + 1/6 = 1/3 of the hedge per hour. To finish the entire hedge (1 whole), the time taken is 1 / (1/3) = 3 hours. The other options miscalculate the combined work rate or assume incorrect conditions.
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