Question

An elevator descends into a

shaft at the rate of 3 m/min. If the descent starts from 40 m above the ground level, how long will it take to reach -20 m?

Answer 1

Step-by-step explanation:

An elevator descends into a mine shaft at rate of 5m/minute.

If the descent starts from 50 m

above ground level,how long will it take to reach - 150m. Ask for details ... 40 MINUTES.

Answer 2

Answer:

20 mins

Step-by-step explanation:

speed= 3m/min

distance= 60 m

explanation: - 40m above ground level+( 20m under the ground.i.e given by -20, -sign indicates under the ground)

Formula: - Time= Distance/speed

=60/3

= 20 mins