Question

manu runs at the speed of 2m/s in a 5km race. how much time will she takes to complete the race
solution plz​

Answer 1

Manu takes 2500 seconds to complete the race.

Given:-

• Speed, s = 2m/s
• Distance covered ,d = 5km

To Find:-

• Total time taken to complete the race ,t

Solution:-

According to the Questionwe have to calculate the total time taken by manu to complete the race.

Conversion of distance into metres :

→ 1km = 1000m

→ 5km = 1000×5 = 5000m

Now, let's calculate the time taken

• Speed = distance/time

substitute the value we get

➻ 2 = 5000/t

➻ 2 ×t = 5000

➻ t = 5000/2

➻ t = 2500s

• Hence, he takes 2500 seconds to complete the race.

Answer 2

Question :-

• Manu runs at the speed of 2 m/s in a 5 km race. How much time will she takes to complete the race?

Answer :-

• Manu will take 2500 seconds to complete the race.

Explanation :-

Given :-

• Speed of Manu = 2 m/s
• Distance covered by Manu = 5 km

To Find :-

• Time taken by Manu to complete the race?

Solution :-

❏ Converting units of distance :-

We know that,

✪ 1 km = 1000 m ✪

↪ Distance in m =(5 × 1000) m

➢ Distance in m = 5000 m

∴ Distance covered by Manu is 5000 m.

• Now, we have distance covered by Manu as well as speed of Manu. So, we can easily calculate time taken by Manu by using formula of speed.

We know that,

✪ $\bf Speed = \dfrac{Distance}{Time}$ ✪

Putting values in formula we get,

⇒ $\sf 2 = \dfrac{5000}{Time}$

⇒ $\sf 2 \:\times\:Time = 5000$

⇒ $\sf Time = {\cancel{\dfrac{5000}{2}}}$

➠ $\bf \red{Time = 2500\:s}$

∴ Time taken by Manu to complete the race is 2500 seconds.

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