Example 17 45 i An engine approaches a hill with a constant

Last updated: 5/29/2023

Example 17 45 i An engine approaches a hill with a constant speed When it is at a distance of 0 8 km it blows a whistle whose echo is heard by the driver after 4 s If speed of engine in air is 330 m s Calculate the speed of engine ii A person standing between two parallel hills fires a gun He hears the first echo after 1 5 s and second after 2 5 s If speed of sound is 332 m s calculate he distance between the hills When will he hear the third echo