Question

A ship anchored in a port has a ladder which hangs over the side. The length of the ladder is 200cm, the distance between each rung in 20cm and the bottom rung touches the water. The tide rises at a rate of 10cm an hour. When will the water reach the fifth rung?

Answer 1

Answer:

The tide raises both the water and the boat so the water will never reach the fifth rung.

Answer 2

AnSwEr -:

Tide takes 8 hours to reach at fifth level.

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Explanation-:

Given ,

The length of ladder is 200 cm

Each rungs = 20 cm

The number of rungs = 200 /20 =

10 rungs

Because ,

fifth rung is a half of ladder and 200 ÷ 2

= 100 cm ,

To find ,

When the water reaches at 100 cm mark

The tide rises at 10 cm an hour

10 t = 100 ,

If the distance between each rung is

20cm.

and

the bottom rung touches the water ,

then length of ladder is 80 cm

10 t = 80

T = 80/10

T= 8 hours

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Tide takes 8 hours to reach at fifth level.

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