A car travelling with 5/7 of its actual speed covers 42 km in 1 hr 40 min 48 sec. Find the actual speed of the car
- 15 km/hr
- 25 km/hr
- 38 km/hr
- 35 km/hr
Explanation
Speed with which the car travels = 5/7th of its actual speed.
Distance covered = 42 km
Time taken to cover the above distance = 1 hour 40 minutes 48 seconds = 1 hr 40 (4/5) min = 126/75 hrs
To find:
The actual speed of the car = ?
Solution:
Let the actual speed of the car be x km/hr
Then, (5/7)x *(126/75) = 42
x = (42 * 7 * 75)/(5 * 126)
x = 35 km/hr
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