Question

Convert a speed of (a) 54 km/h (b) 90 km/h into SI units of speed.

Answer 1

$<p> SI unit of speed is meter per second (m/s) </p> <p> given the values are in km/h </p> <p> to covert km/h to m/s, we multiply it by 5/18 </p> <p> (a) 54 × 5/18 = 3 × 5 = 15m/s </p> <p> (b) 90 × 5/18 = 5 × 5 = 25m/s </p>$

Answer 2

$hey \: mate \: here \: is \: ur \: answer \\ the \: si \: unit \: of \: speed \: is \: \frac{m}{s} \\ a)...54km \div h \\ \\ \: = \frac{54km \times 1000m \times3600s }{h \times 1000m \times 3600s} \\ \\ = \frac{54000m}{3600s} \\ \\ 15 \frac{m}{s} \\ \\ \\ b)...90km \div h \\ \\ = \frac{90km \times 1000m \times 3600s}{h \times 1000m \times 3600s} \\ \\ = \frac{90000m}{3600s} \\ \\ = 25m \div s \\ \\ plzzzz \: mark \: as \: brainliest$