If a Ferrari car is travelling at 126 km/hr, then distance covered in 40 minutes and time taken to cover 189 km are and respectively.

84 km

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81 km

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1.75 hours

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1.5 hours

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Solution

The correct options are
A 84 km
D 1.5 hours
Distance and time are directly proportional to each other if speed is constant.
We know,
$\frac{D i s t a n c e}{T i m e} = S p e e d$
40 minutes = $\frac{2}{3}$ hrs
Hence,
$\frac{D i s t a n c e}{\frac{2}{3}} = 126$
Distance covered in 40 minutes $= \frac{126 \times 2}{3}$
$= 84 k m$

Similarly,
$\frac{189}{T i m e t a k e n}$ = 126
Hence, time taken to cover 189 km
$= \frac{189}{126}$
$= 1.5 h o u r s$

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