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A worm can climb a burrow at 3ft per minute but due to the slipperiness of the burrow, slips down 2 ft before it starts climbing the next minute. If the depth of the well is 30 ft, how much time will the worm take to reach the top?

A.	27 min	B.	28 min
C.	29 min	D.	30 min

Answer and Explanation

Answer:28 min

Explanation:
In one minute the worm climbs (3 – 2), i.e. 1 ft of the burrow.
In 27 min, it will climb 27 ft and in the next 1 minute it will climb 3 ft. at the end of 28th min, as it reaches the top of the well, it will not slip down.
It takes the worm 28 minutes to reach the top

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