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ICSE Class 7 Answered

Two race cars travel in a ways at 90kmph and 120kmph respectively. if d secound cars take 30min less than the first car ,find the distance covered to complete the race .

Asked by Mdazharuddin184 | 24 Feb, 2019, 02:46: AM
Expert Answer
let space straight D space be space the space distance comma space straight T space time space and space straight S thin space speed
straight T equals straight D over straight S
DIfference space in space straight T space equals 30 min equals 30 over 60 hrs equals space straight D over 90 minus straight D over 120
straight D over 90 minus straight D over 120 equals 30 over 60
straight D equals 180 Km
Answered by Arun | 25 Feb, 2019, 11:43: AM
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