A man has to go 10 km to catch a bus. He walks part of the way at 7 km/hr and runs the rest of the way at 12 km/hr. If he takes 1 hour 15 minutes to complete his journey, find how far he walked.
Created: 6 years ago |
Updated: 2 years ago
best des
If he walks W km then he runs (10 - W) km.
Time taken = 1 hr 15 mn = 1.25 hr
ATQ, W/7 + (10 - W)/12 = 1.25
Or, {12W + 7(10 - W)} / 84 = 1.25
Or, 12W + 70 - 7W = 1.25 x 84 - 70
Or, 5W = 35
So, W = 7 km
Md Azizur Rahman
Founder of Satt
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