Soumendra M. answered • 6d

Learn and Enjoy Math-Phy-CS-EE

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|\ß

| \

| \

112 \

| \

|---x---boat

Angle of depression is ß as shown in the figure.

tanß = height/distance = 112/x

Or x =112/tan(9 degree15 min) =687.7

i.e. boat is 687.7 m away from the foot of the cliff

Sam S.

oohhh thanks for explaining, i get it now6d