An object travels \( 10 \mathrm{~km} \) at a speed of \( 100 \mathrm{~m} / \mathrm{s} \) and P a...

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An object travels \( 10 \mathrm{~km} \) at a speed of \( 100 \mathrm{~m} / \mathrm{s} \) and
P another \( 10 \mathrm{~km} \) at \( 50 \mathrm{~m} / \mathrm{s} \). The average speed over the

W whole distance is:
(1) \( 75 \mathrm{~m} / \mathrm{s} \)
(2) \( 55 \mathrm{~m} / \mathrm{s} \)
(3) \( 66.7 \mathrm{~m} / \mathrm{s} \)
(4) \( 33.3 \mathrm{~m} / \mathrm{s} \)
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