The bascule bridge will take another <u>23 seconds</u> to reach its vertical position from its current lift position of 35°.
<h3>How is the time determined?</h3>
Using proportion or ratio, one can determine the additional seconds required by the bridge to achieve a vertical position.
The current lift position is 35°, which took 21 seconds. This implies that the bridge's lift rate is <u>1.67° per second</u> (21/35°). To lift to 90°, the bridge will take 54 seconds (1.67 x 90). Since it has already taken 21 seconds, the bridge requires additional <u>23 seconds</u> (54 - 21) to complete the vertical lift.
<h3>Data and Calculations:</h3>
The vertical position of the bridge = 90°
The horizontal position = 0°
Current lift position = 35°
The time it took the bridge to lift 35° = 21 seconds
Therefore, the time it will take the bridge to reach its vertical position from its horizontal position of 90° is 54 seconds (21 x 90/35).
The additional time required by the bridge to reach its vertical position from its current position of 35° is 23 seconds (54 - 21).
Thus, it will take another <u>23 seconds</u> to reach its vertical position.
Learn more about speed, time, and distance at brainly.com/question/553636
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