Question

A man has covered distance of 80 kilometres in 4 hours .calculate the speed of the bike and express speed of the bike in meter per second?​

Answer 1

Step-by-step explanation:

km covered= 80 km = 80000 m

time taken=4 h= 240 mins=14400

speed = 80000÷14400=5.55555556m/sec

Answer 2

Given :

• As per given in the question,A man covered 80 kilometers distance in 4 hours time.

As we know that if distance and time is given then we have to find out the value of speed.So let's find!

Using formula :

$\sf\boxed{Speed={\dfrac{Distance}{Time}}}$

Denote Distance by 'D' Speed by 'S' and Time by 'T' as given in the question.

Now substitute the values which we are given with...

$\: \: \sf \: s = \frac{d}{t} \\ \\ \: \: \sf \: s = \frac{80}{4} \\ \\ \: \: \sf \: s = 20 \: \frac{km}{hr}$

$\therefore$

Hence, Speed of the man is 20km/hr respectively.

• Now we are said in the question after getting the value of speed in km/hr then we have to convert km/hr into m/sec.

Since we know that,for converting km/hr into m/sec we use this trick

$\: \: \sf \: 20 \frac{km}{hr} = 20 \times \frac{5}{18} \frac{m}{sec} \\ \\ \: \sf \: = \frac{50}{9} \frac{m}{sec}$

Hence,it is converted and it's value is 50/9 m/sec.

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