A car is moving with uniform speed over a circular bridge of radius `R` which subtends an angle of `90^(@)` at its center. Find the minimum posible speed so that the car can cross the bridge without losing the contact any where

Explanation

To solve the problem of finding the minimum possible speed of a car moving over a circular bridge of radius \( R \) that subtends an angle of \( 90^\circ \) at its center, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Geometry of the Problem**:
- The circular bridge subtends an angle of \( 90^\circ \) at the center, which means it is a quarter of a circle.
- The radius of the circular bridge is \( R \).

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