A motor car covered a certain distance in 9 hours, the first half distance at 12 km/h and the second half distance at 15 km/h. Find the total distance covered.
Answer & explanation
Correct answer: option 1
Distance = Speed × Time
Time = \(\frac{Distance}{Speed}\)
Let us consider that , First half Distance = x km
\(\frac{x}{12}\) + \(\frac{x}{15}\) = 9
\(\frac{9x}{60}\) = 9
x = 60 km
So, Total distance = 2 × 60 = 120km
The correct answer is option (1) : 120 km