An elevator descends into a mine shaft at the rate of 6 m/min. If the descent starts from 10 m above the ground level, how long will it take to reach -350m.

Asked by annusharma_2005 | 28th May, 2016, 08:30: PM

Expert Answer:

negative 350 space m space m e a n s space 350 space m e t r e s space b e l o w space t h e space g r o u n d space l e v e l.
I n i t i a l l y space t h e space l e v a t o r space i s space a t space 10 space m space A B O V E thin space t h e space g r o u n d space l e v e l.
H e n c e comma space t o t a l space d i s tan c e space t r a v e l l e d space i s space 350 plus 10 equals 360 space m
r a t e space o f space t r a v e l space i s space 6 m space divided by space m i n.
H e n c e comma space t i m e space t a k e n space i s
fraction numerator t o t a l space d i s tan c e over denominator r a t e space o f space t r a v e l end fraction equals 360 over 6 equals 60 space m i n. space o r space 1 space h o u r.

Answered by satyajit samal | 29th May, 2016, 05:51: PM