From the top of a 20 m high building, the angle of elevation of the top of a tower is 60° and the angle of depression of it's foot is at 45°, then the height of the tower is (√3=1.732)
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R is P's father's nephew. Sis P's cousin but not the brother of R. How is S related to R?
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Which of the following is NOT a pollination agent for cross pollination?
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