The pan coefficient (\(K_p\)) is used to convert evaporation measured from a pan to the equivalent evaporation over a larger water body. For the United States Weather Bureau Class A pan, the average pan coefficient is approximately 0.70, accounting for the differences in heat storage and energy exchange between the pan and a natural water body.
Length of the streets, in km, are shown on the network. The minimum distance travelled by the sweeping machine for completing the job of sweeping all the streets is ________ km. (rounded off to nearest integer)
A particle dispersoid has 1510 spherical particles of uniform density. An air purifier is proposed to be used to remove these particles. The diameter-specific number of particles in the dispersoid, along with the number removal efficiency of the proposed purifier is shown in the following table:
The overall mass removal efficiency of the proposed purifier is ________% (rounded off to one decimal place).