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Two cars are moving at 30 kmph in same direction at an interval of 10 minutes. if a truck moving in the opposite direction crosses the two cars at an interval of 4 minutes the speed of the truck is |
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Answer» Answer: Here we will apply relative CONCEPT let the SPEED of the car is u then relative speed of car with respect to car c is (u+30) Distance is 5 kilometres Time is 4minutes= 4÷ 60 hours Speed= distance/ time U+30= 5/4/60 U+30=5×60/4 On solving above equation we get U+30 = 75 then u= 75 - 30= 45 km/h Explanation: |
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