Question

suppose bus travel first 240 km speed of 80 kilometre per hour it covers next 360 km at a speed of 90 kilometre per hour what is its average speed​

Answer 1

Answer:85 km/h

Step-by-step explanation:

Let x is the first 240 km speed of 80 km/h

Let y be the next 360 km at a speed of 90 km/h

Now the average speed is

= x+y÷2

= 80+90÷2

= 170÷2

=85

Therefore the average is 85 km per hour

Answer 2

Answer:

85 .71 km per hour

EXPLANE:

In first trip Time:240 km ÷ 80 km/hour = 3 hour

In second trip Time: 360km ÷ 90 km/hour = 4 hour

THEREFORE THE AVRAGE SPEED = 250 + 360 KM= 600 KM. 3 +4 HOUR = 7 HOUR

SPEED = 500 ÷ 7 = 87 . 71