A ship after sailing 12 km towards South from a particular place

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 Multiple Choice QuestionsMultiple Choice Questions

51.

A 10 m long ladder is placed against a wall. It is inclined at an angle of 30° at the ground. The distance (in m) of the foot of the ladder from the wall is left parenthesis Given space square root of 3 space equals space 1.732 right parenthesis 

  • 7.32

  • 8.66

  • 8.16

  • 8.26


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52.

A ship after sailing 12 km towards South from a particular place covered 5 km more towards East. Then, the straightway distance of the ship from that place is

  • 11 km

  • 18 km

  • 13 km

  • 15 km


C.

13 km


From the figure,
Let the ship started from point A and sailed 12 km towards south to reach B, and then turn east and finally reach C after travelling 5 km.
AC space equals space square root of left parenthesis AB right parenthesis squared space plus space left parenthesis BC right parenthesis squared end root
AC space space equals space square root of left parenthesis 12 right parenthesis squared space plus space left parenthesis 5 right parenthesis squared end root space equals space square root of 144 plus 25 end root space equals space square root of 169 space equals space 13 space km.


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