If a person walks at 14 km/hr instead of 10 km/hr, he would have walked 20 km more. The actual distance travelled by him is:
50 km
56 km
70 km
80 km
Explanation:
Let the actual distance travelled be $ x $ km.
| Then,$ \dfrac{x}{10} $=$ \dfrac{x + 20}{14} $ |
$\Rightarrow$ 14$ x $ = 10$ x $ + 200
$\Rightarrow$ 4$ x $ = 200
$\Rightarrow x $ = 50 km.