Acar traveled 30 km in 1 hour, 40 km in the next 1 hour, and then 30 km in 2 hours before reaching its destination. what was the car’s average speed?

a car traveled 30 km in 1 hour, 40 km in the next 1 hour, and then 30 km in 2 hours before reaching its destination. what was the car’s average speed?

1st case

car travel 30 km in 1 hour

2nd case

car travel 40 km in 1 hour

3rd case

car travel 30 km in 2 hours

so total distance taken by car

= 30+ 40+ 40

= 110 km

total time taken

= 1 + 1 + 2 = 4 hours

average speed

= total distance / total time

= 110 / 4

= 27.5 km/h

so average speed is 27.5 km/h.

ugh fiel iente of insistí is did kiwis jaj

hydrocarbons are organic compounds that contain only hydrogens and carbons. they can be saturated (those which contain only carbon-carbon single bonds) or unsaturated (those which contain carbon-carbon double or triple bonds) in nature. hydrocarbons can undergo several reactions like substitution, elimination etc.  

on substituting one or more hydrogen atoms in hydrocarbon it results in the formation of haloalkane. as the halogen atoms are large compared to the carbon and hydrogen atoms, due to which the molecular weight increases and the bond become polar because of presence electronegative halogen atom and results in the increase in boiling point of the haloalkane.

thus, the correct option is (b) that is the boiling point of the new compound increases on substituting a hydrogen atom with a halogen in a hydrocarbon.