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Question:

On walking x meters, making an angle of 30° with the ground, to find a ball fallen in a valley, one can reach a depth of 'y' meters below the ground, then what is the relation between x and y?

x=y

x=2y

2x=√3y

2x=y

Solution:

According to the given fig.sin30°=y/x=1/2
∴x=2y