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Q.

A plumber steps out of his truck, walks 60 m east and 35 m south and then takes an elevator, 12 m down to the basement of a building where a leak is occurring. Assume x axis is east; y-axis is north and z-axis is up, displacement of plumber is expressed conventionally as

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a

−60i^−35j^+12k^

b

−60i^+35j^−12k^

c

60i^−35j^+12k^

d

60i^−35j^−12k^

answer is A.

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Detailed Solution

Question Image

From the figure

Final position is 60i^−35j^−12k^

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