Question

10. Bhargav travelled by bus at the speed of 40 kmph. He then boarded a train which moved at the speedof 60 kmph and reached his destination. If the entire distance covered was 150 km in a duration of3 hrs, then how much distance he travelled by train?​

Answer 1

Answer:

90km

Step-by-step explanation:

let he travel x km by bus and y km by train

now

by 1st condition

x+y=150-1

by 2nd condition

x/40+x/60=3. ( speed = distance/time

therefore time =distance /speed)

multiple by 120

3x + 2y=360. -2

now multiple equation 1 by 2

2x +2y=300 -3

subtract equation 3 from 2

now 3x +2y=360

2x +2y=300

_________

-. -. -

x. =60

put x=60in equation 1

60 + y=150

y=150-60=90

Bhargav travelled 90 km by train