Question

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:

Options

• `("v"("t"_1 - "t"_2))/2`

• `("v"("t"_1"t"_2))/(2("t"_1 + "t"_2))`

• v(t₁ + t₂)

• `("v"("t"_1 + "t"_2))/2`

Answer 1

`("v"("t"_1 + "t"_2))/2`