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Shruti can drive from point A to point B and return to point A in 20 minutes. She can drive there and walk back in 30 minutes. What is the time taken by Shruti to walk from point A to B and return from B to A?
1. 20 minutes
2. 40 minutes
3. 15 minutes
4. 45 minutes

1 Answer

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Best answer
Correct Answer - Option 2 : 40 minutes

Given: 

Shruti drive in both ways in 20 minutes 

She drives one way and walks back in 30 minutes

Calculation:

Drive from point A to B + Drive from point B to point A = In 20 minutes

Drive both ways in 20 minutes

Drive one way in 10 minutes      

Drive from point A to B + Walk from point B to A in 30 minutes

⇒ 10 minutes + Walk from point B to A = In 30 minutes

⇒ Walk-in one way = 20 minutes

Walk from point A to B + Walk from point B to A = 20 minutes + 20 minutes = 40 minutes

∴ The time is taken by Shruti is 40 minutes

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