Question

8. A ladder has 10 steps. A labourer has to carry some weight to the top. He
climbs the ladder 2 steps up in one second and 1 step down in the next
second by dancing on a famous tune. In how many seconds would he reach
the top? 17
HOTS​

Answer 1

Answer:

17 seconds.

Explanation:

Well, we can solve this as follows:

Let's say that rungs climbed = x and x = 0.

If we add 2 then x = 2.

Then if we take one away x = 1.

However, the labourer has taken 2 seconds to travel up one rung.

So...

10 X 2 = 20.

BUT!!!!!

They only need to travel up 10 steps - not 11.

Therefore, it would take him 17 seconds to reach the top of the stairs.

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