A marathon runner completes a full marathon of $42 k m$ in $4$ hours and $30$ minutes. What is his speed in $m / s e c$ (rounded to one decimal place)

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Solution

Distance of marathon $= 42 k m$
Time taken to complete marathon $= 4 hours 30 minutes = 4.5 hours$
As we know that,
$speed = \frac{Distance}{time}$
$\Rightarrow speed = \frac{42}{4.5} = 9.33 k m / h r = 2.59 m / s e c$

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A marathon runner completes a full marathon of 42km in 4 hours and 30 minutes. What is his speed in m/sec (rounded to one decimal place)

Distance of marathon =42kmTime taken to complete marathon =4 hours 30 minutes=4.5 hoursAs we know that,speed=Distancetime⇒speed=424.5=9.33km/hr=2.59m/sec

A marathon runner completes a full marathon of $42 k m$ in $4$ hours and $30$ minutes. What is his speed in $m / s e c$ (rounded to one decimal place)

Distance of marathon $= 42 k m$
Time taken to complete marathon $= 4 hours 30 minutes = 4.5 hours$
As we know that,
$speed = \frac{Distance}{time}$
$\Rightarrow speed = \frac{42}{4.5} = 9.33 k m / h r = 2.59 m / s e c$