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A certain journey took 40 min to complete. If half the distance was travelled at an average speed of 100 km/h and the other half at an average speed of 60 km/h, what was the length of the journey? |
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Answer» Answer: 160/3 KMS Explanation: SINCE each speed is GIVEN at the half of the journey, so in Case I: When speed is 100 km/h, We know that speed = distance/time, so distance = speed × time 》distance = (100 × 1)/3 》distance = 100/3 kms Case II: When speed is 60 km/h, distance = speed × time 》distance = 60 × 1/3 》distance = 20 km total distance = (100/3 + 20) kms 》" = (100+60)/3 So total distance = 160/3 kms |
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