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