Question

A bike travels 6 km in 20 minutes Calculate its speed in km/h and how much time it requires to cover 3 km.​

Answer 1

speed = 18 km/h time for 3 km =10 min.

Answer 2

Given:

Distance travelled = 6km

Time taken to travel 6km = 20 mins

To find:

1) Speed in km/h

2) Time required to cover 3 km

Step-by-step explanation:

1) Speed

We know,

Distance travelled = 6km

Time taken to travel 6km = 20 mins

Converting minutes into hour,

$1 min = \frac{1}{60} hour$

$20 min = \frac{20}{60} hour$

      $=\frac{1}{3} hour$

 $Speed = \frac{Distance}{Time taken to complete the distance}$

$Speed= \frac{6}{\frac{1}{3} } km/hr$

           $= 6 * \frac{3}{1} km/hr\\=18 km/hr$

Speed of the bike = 18 km/hr

2) Time taken to cover 3km

   $Time = \frac{Distance}{Speed}$

            $= \frac{3km}{18 km/hr}$

            $=\frac{1 }{6} hr$

Time taken to cover 3km = $\frac{1}{6}$ hr