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ICSE Class 7 Answered

A person walked at a speed of 9km/h to taxi stand and then took taxi , which travelled at a speed of 12.5m/sec If he reached his office 28km away in 48minutes Find the distance between his home and taxi stand and also the time taken to cover this distance
Asked by Prem | 06 Dec, 2017, 09:51: PM
answered-by-expert Expert Answer
begin mathsize 16px style let space straight d subscript 1 space is space the space distance space travelled space with space speed space 9 km divided by hr space let space straight d subscript 2 space is space the space distance space travelled space with space speed space 12.5 straight m divided by straight s space ie. space 45 km divided by hr comma so space left parenthesis convert space units space to space km space and space hrs right parenthesis straight d subscript 1 plus straight d subscript 2 equals 28 9 straight t subscript 1 plus 45 straight t subscript 2 equals 28..... left parenthesis 1 right parenthesis.... d i s tan c e space equals s p e e d cross times t i m e straight t subscript 1 plus straight t subscript 2 equals 0.8..... left parenthesis 2 right parenthesis solve space 1 space & space 2 space to space get space straight t subscript 1 comma straight t subscript 2 and space then space straight d subscript 1 comma straight d subscript 2 space space space space space space space end style
Answered by Arun | 08 Dec, 2017, 04:18: PM

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