A missing helicopter is reported to have crashed somewhere in the rectangular region shown in Fig. 15.2. What is the probability that it crashed inside the lake shown in the figure?

Explanation

To solve the problem of finding the probability that the missing helicopter crashed inside the lake, we will follow these steps:

### Step 1: Calculate the Area of the Entire Region
The entire region where the helicopter can crash is a rectangle. The formula for the area of a rectangle is:
\[ \text{Area} = \text{Length} \times \text{Breadth} \]
Given:
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