Wipro Company Numerical Ability Arithmetic

A worm is at the bottom of a forty foot hole. It can crawl upwards at the rate of four feet in one day, but at night, it slips back three feet. At this rate, how long will it take the worm to crawl out of the hole?
(a) 29 days (b) 37 days (c) 35 days (d) 39 days

Read Solution (Total 5)

ans b. 37 days
for each day worm climp only 1 (4-3)foot. after 36 days worm raech the 37 foot . exactly the 37th day worm reach 40 foot.
10 years agoHelpfull: Yes(9) No(0)

B. 37days is the answer
10 years agoHelpfull: Yes(4) No(1)
37 days
as each day he cover 1 feet so on 37th day he will be out of the hole
10 years agoHelpfull: Yes(3) No(0)
could you plz explain? @praveen
10 years agoHelpfull: Yes(0) No(0)
worm climbs 4 feet in one day and slips 3 feet in night means
in one day it climbs 1 feet.
(4-3)=1 feet.

1 day it climbs =1 feet
2 day it climbs=2 feet
3 day it climbs=3 feet
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37 day in first chance it climbs 36feet +4 feet=40feet
8 years agoHelpfull: Yes(0) No(2)

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