Question

find the speed diameter is 70 km and time is 3 second​

Answer 1

$\huge\frak{\color{red}{Answer:-}}$

1400 km/h

$\large\bold\color{tan}{\underbrace{Explanation}:-}$

Distance = 70 km

Time = 3 seconds = 3/60 minutes = 1/20 minutes

Formula for speed is:-

$\large \color{grey} \frac{ \red {distance}}{ \color{lime}{ time} }$

Applying all the values :-

$= > \frac{70}{ \frac{1}{20} } = 70 \times \frac{20}{1} = 1400 \: km/h$

$\large \orange { = > 1400 \: km/h}$