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A snail climbs 3 m up a vertical wall during the day and slips back 2 m during the night. If the wall is 10 m high, in how many days will t…

2409Medium DSSSB TGT Computer Science 0 replies

A snail climbs 3 m up a vertical wall during the day and slips back 2 m during the night. If the wall is 10 m high, in how many days will the snail reach the top?

Correct answer: B

Explanation

The snail gains 1 m every day-night cycle, so it is at 7 m after 7 days; on the 8th day it climbs 3 m, reaches 10 m and does not slip back.

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