10% of a pole is under water and remaining 18 metres is above water. The length of the pole ( in metres)?
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Step-by-step explanation:
let the length of pole=x
the length of pole in upper water=90%
the length of pole 90%=18
the length of pole 1%=18/90%
the length of pole 100%=18/90%×100%
=1/5%×100%
=20m
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