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The person who will answer this question i will surly mark him or her as a brainleast answer ,please help me in this question.A man completed trip of 136 km in 8 hrs.some part of trip was covered at 15 km/hr and remaining at 18 km/hr.find the part of the trip covered at 18km/hr |
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Answer» Answer: Step-by-step EXPLANATION: Distance=136 km TIME=8 hr Let the time travelled at 15 km/hr(T1) be x hr the time travelled at 18 km/hr(T2) = 8-x hr d1=15x km d2=18(8-x) km 15x+18(8-x)=136 15x+144-18x=136 3x=144-136 3x=8 x=8/3 T2=8-8/3=(24-8)/3=16/3 d2=18*16/3=6*16=96 km |
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