Question

express the speed in m/sec 104 km/hr​

Answer 1

Answer:

1 km/hr = 5/18 m/sec

104 km/hr = 5/18 * 104 km/hr

= 28.88 km/hr

Answer 2

Remember:

• When km/hr is converted into m/sec → Multiply by ⁵/₁₈
• When m/sec is converted into km/hr → Multiply by ¹⁸/₅

Here, km/hr is converted into m/sec.

$104 \times \frac{5}{18} \\ \\ = \sf{ \boxed{ \sf28.88 \: m/sec}}$

$\sf{we \: multiplied \: \frac{5}{18} \: because} \\ \\ \sf{km \: per \: hour = \frac{km}{hr} = \frac{1000m}{60 \times 60sec} = \frac{5}{18} }$

1 km = 1000m

1 hr = 60 minutes = 60×60 seconds = 3600 sec

So, the answer is 28.88 m/sec