Two identical bodies, projected with the same speed at two different angles cover the same horizontal range \( R \). If the time of flight of these bodies are \( 5 \) and \( 10 \) \( \text{s} \), respectively, then the value of \( R \) is ______ \( \text{m} \). [Take \( g = 10 \, \text{m} \, \text{s}^{-2} \)]