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A caterpiller crawls up a pole of 75 inches high , standing from the ground . Each day it crawls up 5 inches and each night it slides down 4 inches . When will it reach the top1. At the end of 70 days2. At the end of 71 days3. At the end of 72 days4. At the end of 73 days |
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Answer» Correct Answer - Option 2 : At the end of 71 days Given: Height of pole is 75 inches Calculation: Caterpillar crawls 5 inches in a day and slide down 4 inches in night Total distance cover by caterpillar day and night = 5 - 4 ⇒ 1 inches Total distance to cover by caterpillar in 70 days = 70 inches Remaining = 75 – 70 ⇒ 5 inches Caterpillar takes 1 day to cover 5 inches Total days required to reach the top = 70 + 1 ⇒ 71 days ∴ It will reach at the end of 71 days. |
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