question_answer

  Prove that in a right triangle, the square of the hypotenuse is equal to the sum of the squares of the other two sides. Using the above, solve the following: A ladder reaches a window which is 12 m above the ground on one side of the street. Keeping its foot at the same point, the ladder is turned to the other side of the street to reach a window 9m high. Find the width of the street if the length of the ladder is 15 m.

Answer:

  Sol. Part I Book Work. For Part II                Let AB denote width of the street.                                                        From right angled triangles OAP and OBQ,               Again  width of the street = OA + OB = 12 + 9 = 21 cm