A car takes $4$ hours to cover a distance, if it travels at a speed of $40$ mph. What should be its speed to cover the same distance in $1.5$ hours?

80

mph

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106.66

mph

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120.87

mph

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140.54

mph

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Solution

The correct option is B $106.66$ mph
Speed $= \frac{D i s t a n c e}{t i m e} \Rightarrow$ Distance=Speed $\times$ time $= 40 \times 4 = 160$ miles
$∴$ Speed $= \frac{D i s t a n c e}{T i m e} = \frac{160}{1.5} = \frac{1600}{15} = 16.66 m p h$

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A car takes 4 hours to cover a distance, if it travels at a speed of 40 mph. What should be its speed to cover the same distance in 1.5 hours?

The correct option is B 106.66 mphSpeed=Distancetime⇒ Distance=Speed× time =40×4=160 miles∴ Speed=DistanceTime=1601.5=160015=16.66mph

A car takes $4$ hours to cover a distance, if it travels at a speed of $40$ mph. What should be its speed to cover the same distance in $1.5$ hours?

The correct option is B $106.66$ mph
Speed $= \frac{D i s t a n c e}{t i m e} \Rightarrow$ Distance=Speed $\times$ time $= 40 \times 4 = 160$ miles
$∴$ Speed $= \frac{D i s t a n c e}{T i m e} = \frac{160}{1.5} = \frac{1600}{15} = 16.66 m p h$