rahul covers 350km in 7hrs and 60km in 50 min find his average speed pls tell​

Speed Unit Conversion

To convert speed from Kilometre per hour (Km/h) into metre per second (m/s), we multiply by

\dfrac{5}{18} .

To convert m/s into Km/h, we multiply by

\dfrac{18}{5} .

Reason:

1 \: Km/h= \dfrac{1 \: Kilometre}{1 \: hour}= \dfrac{1000 \: metre}{60 \times 60 \: second} = \dfrac{5}{18} \: m/s

Example: Convert:

90 Km/h into m/s

15 m/s into Km/h

75 cm/s into Km/h

45 Km/h into m/min

Solution:

1.

90 \: Km/hr =(90 \times \dfrac{5}{18}) \: m/s= 25 \: m/s

2.

15 \: m/s =(15 \times \dfrac{18}{5}) \: Km/h = 54 \: Km/h

3.

75 \: cm/s =0.75 \: m/s (

\because

75 cm=\dfrac{75}{100} \: m =0.75 \: m )

=(0.75 \times \dfrac{18}{5}) \: m/s =2.7 \: Km/h

4.

45 \: Km/h =\dfrac{45 \: Km}{1 \: hr}= \dfrac{(45 \times 1000) \: m}{60 \:min}=750 \: m/min