10th Class
Mathematics
Some Applications of Trigonometry
Question Bank
Some Applications of Trigonometry
question_answer
A person standing on the bank of a river observes that the angle of elevation of the top of a tower on the opposite bank is\[\text{3}0{}^\circ \]. He moves 40 m towards the bank and finds the angle of elevation to be\[\text{6}0{}^\circ \]. What is the width of the river?