Question

Brian travels a distance at a speed of
12 km/h and returns at 9 km/h. If the
total time taken by him is 3 h 30 min, find
the distance he travelled one way.

please tell me step by step in the process ​

Answer 1

Answer:

73.5 km

Step-by-step explanation:

speed = distance/ time

distance = speed * time

they travel in opposite direction so add speed

distance = 12+9*3.5

= 21* 3.5= 73.5

hope it helps please mark my as brainliest

Answer 2

Answer:

Let distance travelled one way = X

Since he returned, distance is same

Average speed = total distance / total time

= 2X / 3.5 h

Average of 12&9 = 12+9/2= 21/2 = 10.5 kmph

10.5 = 2X / 3.5

10.5 * 3.5 = 2X

36.75 = 2X

X = 36.75/2

. = 18.375 m

approx 18.4m