A person standing between two parallel hills fires a gun and hears the first echo after t1 sec and the second echo after t2 sec. The distance between the two hills is:
A. \(\frac{v\left(t_{1}-t_{2}\right)}{2}\)
B. \(\frac{v\left(t_{1} t_{2}\right)}{2\left(t_{1}+t_{2}\right)}\)
C. v(t1 + t2)
D. \(\frac{v\left(t_{1}+t_{2}\right)}{2}\)
Answer:D
A person standing between two parallel hills fires a gun and hears the first echo after t1 sec and the second echo after t2 sec. The distance between the two hills is:
A. \(\frac{v\left(t_{1}-t_{2}\right)}{2}\) B. \(\frac{v\left(t_{1} t_{2}\right)}{2\left(t_{1}+t_{2}\right)}\) C. v(t1 + t2) D. \(\frac{v\left(t_{1}+t_{2}\right)}{2}\)