Question

Rama Swamy walked to the town at a speed of 4 km/hr and came back by bicycle
at a speed of 12 km/hr. The total time for to and for journey was 2-hrs. find the
times taken by him to travel by foot and bicycle.​

Answer 1

Answer:

amy walked to the town at a speed of 4 km/hr and came back by bicycle at a speed of 12 km/hr.

The total time for to and fro journey was 5/2 hrs.

Find the times taken by him to travel by foot and bicycle.

:

Let t = time at 12 km/h

then

(2.5-t) = time at 4 km/hr

:

Write a distance equation: dist = speed * time

:

ride dist = walk dist

12t = 4(2.5-t)

12t = 10 - 4t

12t + 4t = 10

16t = 10

t = 10/16

t = .625 hrs to return on the bike

then

2.5 - .625 = 1.875 hrs to walk it

:

:

Confirm this by finding the distances

.625(12) = 7.5 km

1.875(4) = 7.5 km

Answer 2

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Step-by-step explanation:

amy walked to the town at a speed of 4 km/hr and came back by bicycle at a speed of 12 km/hr.

The total time for to and fro journey was 5/2 hrs.

Find the times taken by him to travel by foot and bicycle.

:

Let t = time at 12 km/h

then

(2.5-t) = time at 4 km/hr

:

Write a distance equation: dist = speed * time

:

ride dist = walk dist

12t = 4(2.5-t)

12t = 10 - 4t

12t + 4t = 10

16t = 10

t = 10/16

t = .625 hrs to return on the bike

then

2.5 - .625 = 1.875 hrs to walk it

:

:

Confirm this by finding the distances

.625(12) = 7.5 km

1.875(4) = 7.5 km

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