Question

an elevator descends into a mine shaft at the rate of 5 metre per minute if the descends starts from 10 metre above the ground level how long will it take to reach -450 metre?​

Answer 1

Step-by-step explanation:

Speed of elevator = 5 m ( per min )

10 - ( - 450 )

10 + 450

= 460 m

Time taken to travel 5 m = 1 min

Time taken to travel 1 m = 1 by 5

Time taken to travel 450 m = 90 min

90 min = 1 hr 30 min