Question

A child walks 90 metres in 3 minutes. The speed in m/s is ? A.0.3 m/s B.0.5 m/s C.3 m/s D.5 m/s

Answer 1

Hey Pretty Stranger!

• Distance = 90 metres

• Time = 3 minutes

We hafta change the given time in its standard form :

[ 1 minute = 60 seconds, 3 minutes = 60 × 3 = 180 seconds ]

Now, we know that :

$\bigstar \: \sf \: Speed = \dfrac{Distance \: covered}{Time \: taken}$

→ Speed = $\sf\cancel\dfrac{90}{180}$

→ Speed = $\sf \dfrac{1}{2}$

→ Speed = 0.5 m/s

$\therefore$ Speed of the child is 0.5 m/s.