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A runs 1.5 Times as fast as B can. If A gives B a start of 50 m, how far must the winning post be in order that A and B reach at the same time

  • A.150 m
  • B.120 m
  • C.125 m
  • D.180 m 

Answer: A

Let the winning post be \( d \) metres away. A runs \( d \), B runs \( d - 50 \), and they finish together.

\[ \frac{d}{1.5} = \frac{d - 50}{1} \]

\[ 2d = 3d - 150 \quad\Longrightarrow\quad d = 150 \text{ m} \]

Checking: A covers 150 m while B covers 100, and \( \tfrac{150}{100} = 1.5 \).

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