Question

If a man runs at 2 m/s how many kilometre does he run in 1 hour 20 minute solution..?​

Answer 1

Answer:

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9.6 km

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$Speed = v = 2 \, \, m/s \\ \\ Time = t = 1 \, \, hr \, \, 20 \, \, min$

We need to convert time into seconds:

$1 \, \, hr \, \, 20 \, \, min \\ \\ = (1\times 60 \times 60) + (20\times 60) \, \, seconds \\ \\ = 3600 + 1200 \, \, seconds \\ \\ = 4800 \, \, seconds$

Now, we can find the distance covered:

$Speed = \frac{Distance}{Time} \\ \\ \implies v = \frac{d}{t} \\ \\ \implies d = v\times t \\ \\ \implies d = 2 \times 4800 \, \, m \\ \\ \implies d = 9600 \, \, m \\ \\ \implies d = \frac{9600}{1000} \, \, km \\ \\ \\ \implies \boxed{d=9.6 \, \, km}$

Thus, The man runs 9.6 kilometres in 1 hours 20 minutes...

Answer 2

Answer: 9.6 km

FAST Explanation: 1 hr 20 mins means 80 mins

2 m/s means in one minute=60s he will run 120 meters

Now multiplying the total time by distance in one minute= 80 × 120

= 9600 meters = 9.6km

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