Question

its average speed.
Q8. A train takes 4 hours to complete a journey by travelling at a speed of 60 km/h. How long will the
train take if its speed is reduced to 40 km/h?
09. The distance between two stations is 1200 km. A train covers first half of the journey at a speed
of 60 km/h and the remaining half of the journey at a speed of 50 km/h. How much time is taken​

Answer 1

Answer:

speed=

time

distance

speed=

2

100

=50kmh

−1

Answer 2

Answer:

q8= distance=4×60=240km

if speed reduced to 40km/h

240/40= 6 hours ans

Q9 in first half-

time =600/60=10hours

in second half-

time = 600/50 =12 hours

${t_1+t_2}$=22hours