EM-2303

Rate and average speed

E Math · Secondary 4 · Hard · Rate and average speed

A car travels at a constant speed of 18 m/s for 12 s and then comes to rest uniformly in the next 9 s.

Find the total distance travelled during the 21 s.

$297\text{ m}$
$225\text{ m}$
$324\text{ m}$
$198\text{ m}$

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