Math Problem Statement

Virat can complete a work in 30 days and Daniel is 60% more efficient than Virat to complete the same work. Find the total time taken by Daniel to complete the work.

Solution

To find how long it takes Daniel to complete the same work, we need to use the efficiency relationship between Virat and Daniel.

Step 1: Virat's work rate

Virat completes the work in 30 days, so his work rate is: Virat’s work rate=130 work per day.\text{Virat's work rate} = \frac{1}{30} \text{ work per day}.

Step 2: Daniel's efficiency

Daniel is 60% more efficient than Virat. So, Daniel's efficiency is: Daniel’s efficiency=1+0.60=1.60×Virat’s efficiency.\text{Daniel's efficiency} = 1 + 0.60 = 1.60 \times \text{Virat's efficiency}.

Step 3: Daniel's work rate

Daniel's work rate is 1.60 times Virat's work rate: Daniel’s work rate=1.60×130=1.6030=8150 work per day.\text{Daniel's work rate} = 1.60 \times \frac{1}{30} = \frac{1.60}{30} = \frac{8}{150} \text{ work per day}.

Step 4: Time taken by Daniel to complete the work

Time taken by Daniel to complete the work is the reciprocal of his work rate: Time taken by Daniel=18150=1508=18.75 days.\text{Time taken by Daniel} = \frac{1}{\frac{8}{150}} = \frac{150}{8} = 18.75 \text{ days}.

Thus, Daniel can complete the work in 18.75 days.

Would you like further details or have any questions?

Here are some related questions to explore:

  1. What if Daniel were 50% more efficient than Virat?
  2. How would the time change if both worked together on the task?
  3. If Virat's time to complete the work changes to 25 days, what is Daniel's new time?
  4. How much work can Daniel complete in 10 days?
  5. If a third person, Alex, is 20% less efficient than Virat, how long would it take Alex to finish?

Tip: To compare efficiencies, always convert to rates (work per day) to handle calculations smoothly.

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Math Problem Analysis

Mathematical Concepts

Work and Time
Efficiency
Ratio and Proportion

Formulas

Work rate = 1 / Time taken
Efficiency relation: Daniel's efficiency = 1 + 60% of Virat's efficiency
Daniel's time = 1 / Daniel's work rate

Theorems

Efficiency Theorem in Work and Time Problems

Suitable Grade Level

Grades 8-10