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Question

A submarine after travelling 100 KM from the Shore, descended 11/10 KM below the sea level. Then it ascended about 3/5 KM. The next day, it again descended by 9/10 KM. What is its current position with respect to sea level? What is the horizontal distance of submarine from the sea shore?

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Solution

The submarine descended by 1.1 km
then it ascended by 0.6 km
then again it descended by 0.9 km
so the position of the submarine-
= 0 -1.1 + 0.6 - 0.9
= -1.4km
so the submarine is 1.4 km below the sea level
and the horizontal distance of submarine from the sea shore remains the same as 100KM

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