A man made trip of 480 km in 9 hr . Some part of the trip was covered at 45 km/hr and the remaining at 60 km/hr . Find the part of the trip covered by him at 60 km/hr.
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let the part covered at 60km/hr. be x
so dist. covered at 45km/hr be 480-x
x/60 + 480-x/45 = 9
3x + 4(480-x) = 1620
1920 - 1620 = x
x = 300 km
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so dist. covered at 45km/hr be 480-x
x/60 + 480-x/45 = 9
3x + 4(480-x) = 1620
1920 - 1620 = x
x = 300 km
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