A person is walking at a speed of 10 km/hr . Find the distance he covers in 10 minutes?
Answers
Answer:
50 min
Step-by-step explanation:
Given:
Speed of man = 10 km/hr
After every kilometer he take rest for = 5 min
Calculation:
Time to cover 1 km distance = 1/10 × 60 = 6 min
Time to cover 5 km distance if the person takes rest for 5 min every kilometer ⇒
⇒ 1 km + 5 min + 1 km + 5 min + 1 km + 5 min + 1 km + 5 min + 1 km
⇒ 6 min + 5 min + 6 min + 5 min + 6 min + 5 min + 6 min + 5 min + 6 min
⇒ 50 min
Other method:
Time to cover 5 km distance = 5/10 × 60 = 30 min
The person takes rest for four times to cover 5 km so
Rest time = 5 × 4 = 20 min
∴ Required time = 30 min + 20 min = 50 min
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Answer: 1620m or 1.620km
We can substitute the value Speed and Time given in the question in the speed formula to find the distance covered...
Speed = 10 km/hrs
Time = 10 minutes
But before we substitute them, we have to convert them into their standard units. The standard unit of speed is m/s and the standard unit of time is seconds. So to convert a unit from km/hrs to m/s, we have to multiply the digit by 1000/3600. And to convert minutes to seconds, we have to multiply the digit by 60.
Speed = 10 x 1000/3600
= 1 x 1000/360
= 100/36
= 2.7 m/s (Approx)
Time = 10 x 60
= 600
Now we can substitute,
Speed = Distance/Time
2.7 = Distance/600
Distance/600 = 2.7
Distance = 2.7 x 600
= 1620m
So the distance he covers in 10 minutes is 1620m
If you want the distance in km, then we can divide it by 1000 to get 1.620km