Question

man walks 8km in 1hour 20minutes. what is the speed of the man in km/hr
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Answer 1

Answer:

8 km = 8, 000m

1 hour 20 utes = 4, 800 seconds

Speed Distance / Time =

eed = 8, 000/4, 800

reed = 1.666 .... or 2 m/s (approx.)

Now, converting it in km/hr, we get

2 * 18 / 5 = 36/5 = 7.2 km/h * r

Answer:

The speed of the man in km/hr is 7.2 km/ hr.

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Answer 2

Answer:

speed of man = 6 km / hr

Step-by-step explanation:

given

man walk  distance D = 8 km

time taken T = 1 hr 20 min

find speed S in km / hr = ?

first we take time in hr

time given T = 1 hr 20 min

we should convert 20min into hr

we know 60 min make 1 hr

so            1 min make 1/60 hr

then       20 min make (1/60)×20 = 20/60 = 1/3 hr

20 min = 1/3 hr

so the total time taken by man = (1 + 1/3 ) hr = 4/3 hr

T = 4/3 hr

D = 8 km

formula

speed = distance /time

speed S = D/T

speed = 8/(4/3)

speed = (8×3)/4 = 6 km/hr

speed of man = 6 km / hr