the height of a mercury barometer is 76 cm at sea level and 50 cm at the top of a hill. Determine the height of the hill. (Densities of air and mercury are `1.36 kg m^(-3) and 13.6 xx 10^(3) kg m^(-3))`
hint : Difference of pressure =76 cm - 50 cm = 26 cm of mercury
` 0.26 xx 9.8 xx 13.6 xx 10^(3) Nm^(-2)`
pressure due to h metre of air = `h xx 9.8 xx 1.36`]

Answer

74.99 cm