Question

excavator excavetes at the rate of 25m per hour how long it would take to reach -450 if it starts excavation from the hill of height 50 m.​

Answer 1

Answer:

hmm; mmmmm:):(:#####

Answer 2

Answer:

initial height= 50 m

final depth= - 450 m

total distance to be descended= -450 - 50

= -500 m

thus, time taken= -500 ÷ (-25)

=20

hence time taken by the elevator= 20 hours