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If a vertical pole of length $7.5 \text{ m}$ casts a shadow $5 \text{ m}$ long on the ground and at the same time, a tower casts a shadow $24 \text{ m}$ long, then the height of the tower is :
- (a)$20 \text{ m}$
- (b)$40 \text{ m}$
- (c)$60 \text{ m}$
- (d)$36 \text{ m}$
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(D) $36 \text{ m}$