Question

Aman starts his journey at 8 am at point "A" which is 40m km away from point "C". From 8 am to 8:20 am, he travels with certain speed and rests about another 20 minutes at "B" then, he travelled with a certain speed for 20 minutes and completed the journey at 9:00a.m. Find the average speed of the man for his whole journey.​

Answer 1

Answer:

Correct option is

A

18 km/hr

Let the total distance travelled be x km Then total time taken = 10x/3+20x/3+60x/3=30x+60x+180x

=1806x+3x+x=18010x=18x hrs Then average speed = =TotaltimetakenTotaldistancetravelled

=x/18x km/hr = 18 km/hr