Question

A man stands in between two high-rise buildings and explodes a cracker. He hears two successive echoes after 0.8 s and 1.6 s. The distance between two high-rise buildings is:

Options

• 398.4 m

• 396.4 m

• 392.4 m

• 388.4 m

Answer 1

398.4 m

Explanation:

\[ d_1 = \frac{332 \times 0.8}{2} = 132.8 \ \text{m} \]

\[ d_2 = \frac{332 \times 1.6}{2} = 265.6 \ \text{m} \]

\[ \text{Total Distance} = 132.8 + 265.6 = 398.4 \ \text{m} \]