MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Speed

Shalu cycles ...

Question

Shalu cycles to her school at an average of $12$ km/hr. It takes her $20$ minutes to reach the school. If she wants to reach her school in $15$ minutes, what should be her average speed?

Open in App

Solution

$S p e e d = \frac{D i s t a n c e}{T i m e}$
$\Rightarrow D i s t a n c e = S p e e d \times T i m e$

So, distance to the school $= 12 k m / h r \times 20 m i n u t e s = 12 k m / h r \times \frac{20}{60} h o u r = 4$ km
So, to cover distance $4 k m$ in $15$ minutes,

$S p e e d = \frac{4 k m}{15 m i n} = \frac{4 k m}{(\frac{15}{60}) h o u r} = 16 k m / h r$

Suggest Corrections

thumbs-up

1

Similar questions

Q. Meenakshee cycles to her school at an average speed of 12 km/hr and takes 20 minutes to reach her school. If she wants to reach her school in 12 minutes, then what should be her average speed?

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Speed

PHYSICS

Watch in App

explore_more_icon

Explore more

Standard IX Physics

Join BYJU'S Learning Program

CrossIcon