Question

Person ‘x’ moves from point A to point B. with uniform speed 30 km/hr, B to A with 60 km/hr

then average speed is _________×10m/s​

Answer 1

Answer:

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Explanation:

Speed of car in first 15 minutes = 40 km/h

Distance covered = speed × Time taken

60 minutes = 1 hour

15 minutes =

60

15

​

hour

Distance covered = 240×

60

15

​

=10km

Speed of car in next 15 minutes = 60 km/h

Distance covered = 60×

60

15

​

=15km

∴ Total distance covered = (10+15)km = 25 km

∴ 25 km is correct

Answer 2

total distance traveled upon total time

let X be the distance between a and b

X/t1=30

t1=X/30

t2=X/60

now

total time=t1+t2=3x/60

total distance traveled=2x

I guss you'll divide

you'll get 40

now convert the units

40×5/18