Asked by Balaji
A man travels for 5 hr 15 min if he covers the first half of the journey at 60 kmph and the rest at 45 kmph. find the total distance travelled by him.
Answers
Answered by
Reiny
total time = 5 hrs, 15 minutes = 5.25 hrs
let the total journey be 2x
time at 60 km/h = x/60
time at 45 km/h = x/45
x/60 + x/45 = 5.25 = 21/4
times 180 , the LCD
3x + 4x = 945
7x = 945
x = 135
total distance = 2x = 270 km
check:
135/60 = 9/4 hrs
135/45 = 3 hrs
total time = 9/4 + 3 = 21/4 = 5 1/4
let the total journey be 2x
time at 60 km/h = x/60
time at 45 km/h = x/45
x/60 + x/45 = 5.25 = 21/4
times 180 , the LCD
3x + 4x = 945
7x = 945
x = 135
total distance = 2x = 270 km
check:
135/60 = 9/4 hrs
135/45 = 3 hrs
total time = 9/4 + 3 = 21/4 = 5 1/4
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