out of 555km ram travel distance by bus and remaning by car bus travels with average speed of 60km/hr and average speed of car is 75km/hr .it takes total 8 hr to complete the journey .find distance travel by bus
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Step-by-step explanation:let the distance covered by car of speed 60km/hr be----x and distance covered by car of speed 75 km\hr be-----y
from 1st condition:x+y=555km₋₋₋₋(1) from 2nd condition x/60+y\75=8 therefore 75x+60y/60Х75=8 therefore 75x₊60y=36000 divide by 15 we get 5x+4y=24000₋₋₋₋(2) multiply eq.(1) by 4 4x+4y=2220------(3) subtract eq.(3)from eq.(2) 5x+4y=24000 (-)4x+4y=2220 ----------------------- x=180 substituting x=180 in eq.(1) x+y=555km₋₋₋₋(1) 180+y=555 y=375 therefore the car has covered 375 km.
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