**A ladder reaches a window 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 9 m high. If the length of the ladder is 15 m, then the width of the street is**

**(a) 30 m**

**(b) 24 m**

**(c) 21 m**

**(d) 18 m**

**Solution:**

**More Solutions:**

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