A man can reach a certain place in 30 hours. If he reduces his speed by 1|15 th, he goes 10 km less in that time. Find his speed in km | hr? - IQ786

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A man can reach a certain place in 30 hours. If he reduces his speed by 1|15 th, he goes 10 km less in that time. Find his speed in km | hr?

A man can reach a certain place in 30 hours. If he reduces his speed by 1|15 th, he goes 10 km less in that time. Find his speed in km | hr?

15 km/h

5 km/h

10 km/h

None

Explanation

Distance covered in $30$ hours = $30 x$ km

New speed = $[x - \frac{x}{1 5}] k m / h r = \frac{1 4 x}{1 5} k m / h r$

Distance covered in 30 hours = $\frac{1 4 x}{1 5} \times 30 =$ 28x km Given, $30 x - 28 x = 10 k m$ $\Rightarrow$ $x = 5$ km/hr