Question

Find the time taken by Rina to cover a distance of 500m, if she runs at a speed of 5
m/s. (Express the time in mins and secs)

Answer 1

Solution:

Speed = 2m/s

Time taken to reach school = 15 minutes = 15 × 60 seconds = 900 seconds

Speed = (Distance travelled)/ (Time)

Distance = (Speed x Time)

= 2 x 900 =1800m

Also 1km= 1000m

Therefore 1800x (1/1000) = 1.8km.

The distance between her house and the school is 1.8 km.

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Answer 2

To find : time taken by Rina to cover a distance .

Given : distance = $500\ m$   , speed = $5\ m/sec$

Solution :

• According to question we have to find the time taken by Rina to cover a distance of  $500\ m$ with  the speed of $5\ m/sec$  .
• To calculate time , we have following formula of speed :
• $Speed = \frac{Distance}{Time }$
• Substituting the values in above formula ,

         $5\ m/sec = \frac{500\ m}{Time } \\Time = \frac{500\ m}{5\ m/sec} \\Time = 100\ sec$

• We know that , $1$ minute = $60$ seconds
• Therefore , $100$ sec = $1$ min $40$ sec .

Hence , Rina took $1$ min $40$ sec  to cover the distance .