Physics, asked by harshparmar2910, 8 months ago

A car covers 75 km of its journey at
60 km/hr, the next 45 km at a speed of 30km/hr and the remaining part of the journey in 2 firs and 15 min. If the aver-age speed for the journey was 45 km/hr, how much
distance was covered in the last part of the journey?
a) 100 km c) 80 km
b) 90 km d] 180 km​

Answers

Answered by shivank963
0

Answer:

Let the total distance travelled be x km Then total time taken =

10

x/3

+

20

x/3

+

60

x/3

=

30

x

+

60

x

+

180

x

=

180

6x+3x+x

=

180

10x

=

18

x

hrs Then average speed = =

Totaltimetaken

Totaldistancetravelled

=

x/18

x

km/hr = 18 km/hr

Similar questions