Question : A bullock cart has to cover a distance of 120 km in 15 hours. If it covers half of the journey in $\frac{3}{5}$th time, the speed to cover the remaining distance in the time left has to be:
Option 1: 6.4 km/hr
Option 2: 6.67 km/hr
Option 3: 10 km/hr
Option 4: 15 km/hr
Correct Answer: 10 km/hr
Solution :
A bullock cart has to cover a distance of 120 km in 15 hours.
It covers half of the journey in $\frac{3}{5}$th time.
So, remaining time = $\frac{2}{5}$ × 15 = 6 hr
Remaining distance = $\frac{120}{2}$ = 60 km
$\therefore$ Required speed = $\frac{60}{6}$ = 10 km/hr
Hence, the correct answer is 10 km/hr.
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