27-08-2014
Mathematics

Answered

A runner covers 55 yards in 5.5 seconds. Find the runner's average speed in miles per hour.

Verified Answer :

27-08-2014

\(V=\frac{s}{t},where\ V-speed,\ s-distence\ ,t-time\\\\V=\frac{55y}{5,5s}=10\frac{y}{s}=10\frac{0,000568m}{\frac{1}{3600}h}=\frac{0,00568m}{\frac{1}{3600}h}=0,00568\cdot3600\frac{m}{h}=\\\\=20,448\frac{m}{h}\)

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