Question

In travelling from Pune to Nagpur, Rahul drove his bike for 2 hrs. at 60 km/h, and 3 hrs
at 70 km/h. Find his average speed.

Answer 1

Answer:

Given:

Rahul drove his bike for 2 hrs at 60km/hr Rahul drove his bike for 3 hrs at 70km/hr

To Find:

Average speed during whole journey..!!

Solution:

Rahul drove his bike for 2 hrs at 60 km/hr

Rahul drove his bike for 3 hrs at 70 km/he

Total time Rahul drove for:- (2+3) hr = 5 hr

Total speed Rahul drove for = (60+70) kmph = 130 kmph

Average speed Rahul travelled in = 26 kmph

The average speed during whole journey is 26 kmph

Answer 2

Rahul drove his bike for 2 hrs at 60 km/hr.

Rahul drove his bike for 3 hrs at 70 km/hr.

⁂ total time Rahul drove for = (2 + 3) hr = 5 hr

total speed Rahul drove for = (60 + 70)kmph = 130 kmph

⁂ average speed Rahul travelled in =

\frac{total \: speed}{total \: time}

totaltime

totalspeed

\begin{gathered}= \frac{130}{5} kmph \\ = 26 \: kmph\end{gathered}

=

5

130

kmph

=26kmph