Question

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Answer 1

Answer:

take the ratio of flagstaff to its shadow= 6.4:9 =32:45 -(1)

let the lenght of the building be X so, its ratio will equal to the above ratio -(1)

now, eqating it we get,

X/22.5=32/45

X=16 m

hence the length of the building be 16m.