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- A man travelled a distance of 75 km in 5 hours partly on foot at the rate of 6 km/hour and partly by scooter at 18 km/hour.
Question 1:
A man travelled a distance of 75 km in 5 hours partly on foot at the rate of 6 km/hour and partly by scooter at 18 km/hour.Find the distance travelled by scooter?
A. 56 km
B. 52.25 km
C. 48.5 km
D. 67.5 km
Feedback Average speed = 75/5 = 15 km/hr
By method of allegation:
6------------------18
.........15..........
3................9
1 : 3
1 : 3 is the ratio of times.
So time by scooter = 3/(1+3) * 5 = 3.75 hrs
So distance by scooter = 3.75 * 18 = 67.5 km
By method of allegation:
6------------------18
.........15..........
3................9
1 : 3
1 : 3 is the ratio of times.
So time by scooter = 3/(1+3) * 5 = 3.75 hrs
So distance by scooter = 3.75 * 18 = 67.5 km
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