A bike travels a distance of $200 k m$ at a constant speed. If the speed of the bike is increased by $5 k m$ . an hour, the journey would have taken $2$ hours less. What is the speed of the bike?

30 k m / h o u r

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25 k m / h o u r

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20 k m / h o u r

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15 k m / h o u r

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Solution

The correct option is D $20 k m / h o u r$
Let the speed be x km.p.h.
$\Rightarrow \frac{200}{x} - \frac{200}{x + 5} = 2$
$\Rightarrow x = 20$ .

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A bike travels a distance of 200 km at a constant speed. If the speed of the bike is increased by 5 km. an hour, the journey would have taken 2 hours less. What is the speed of the bike?

The correct option is D 20 km/hourLet the speed be x km.p.h.⇒200x−200x+5=2⇒x=20.

A bike travels a distance of $200 k m$ at a constant speed. If the speed of the bike is increased by $5 k m$ . an hour, the journey would have taken $2$ hours less. What is the speed of the bike?

The correct option is D $20 k m / h o u r$
Let the speed be x km.p.h.
$\Rightarrow \frac{200}{x} - \frac{200}{x + 5} = 2$
$\Rightarrow x = 20$ .