Question

A car travels a distance of 170 km in 2 hrs partly at a speed of 100 kmph and partly at 50 kmph. The distance travelled at speed of 50 kmph is:

Answer 1

Answer:

36minutes

Step-by-step explanation:

Let us consider,

T1 time for travelling 100kmph

T2 time for travelling 50kmph

So wkt, distance=speed*time

So, 100*T1 +50*T2 =170, here 170 is total distance to be travelled

T1+T2 =2,since total time is 2hrs

By solving these two equations,

T1 =7/5hrs, T2 =3/5hrs

T2=(3/5)*60 minutes

T2 =36minutes