Question

what is the speed of sound in air

Answer 1

The speed of sound  is the distance travelled per unit time by a sound wave as it propagates through an elastic medium. At 20 °C (68 °F), the speed of sound in air is about 343 metres per second (1,235 km/h; 1,125 ft/s; 767 mph; 667 kn), or a kilometre in 2.9 s or a mile in 4.7 s.
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Answer 2

${\sf{ \blue{\underline{\pink{ \underline{{ \red{The \: speed \: of \: sound \: is \: \blue{343 \: \frac{m}{s} } \: in \: air.}}}}}}}}$