Speed Rate Distance Time | Inverse Proportion

Описание к видео Speed Rate Distance Time | Inverse Proportion

At 70kph, Robin can reach his home within 50 minutes. At what rate should he drive his car so that he can reach home 15 minutes earlier?
a. 60kph
b. 80kph
c. 90 kph
d. 100 kph
e. 110 kph

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