Question

(b) The man is going to exit the stairwell at the 4th floor, which is at a height of 42 feet above

Answer 1

The time taken to get to the 4th can be obtained by dividing the distance given by the speed of the lift.

Distance, height from ground to 4th floor = 42 feets

Time taken to get to the 4th floor = t

Recall :

Time = Distance / speed

• We aren't given the speed of the lift ;

• Assume speed of lift is 7 ft/sec

The time taken to get to the 4th floor will be :

• $t = \frac{42}{7} = 6 \: seconds$

Therefore, to obtain the time taken, divide the distance or height of the 4th floor by the speed of the lift.

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