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A train travels at a speed …

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A train travels at a speed of 69km/h for 0.52h, at 30 km/h for next 0.24 h and then at 70 km/h for next 0.71h . What is the average speed of the train.( Chapter- 8 Motion )

Posted by Yuvraj Kumar 3 years, 9 months ago

CBSE > Class 09 > Science

1 answers

Bhumi Ahuja 3 years, 9 months ago

???????????:- ?????:- ????? ????? ,?¹= 69??/? ???? ????? ??? ???? ???? ?? ????,?²=0.52? ?????? ?????,?²=30??/? ???? ????? ??? ???? ???? ?? ????,?²=0.24? ????? ?????,?³=70??/? ???? ????? ??? ???? ???? ?? ????,?³=0.71? ?? ?????????:- ??????? ?????,?(???.)=??? ??????? ?? ?? ????:- ????????=?????×???? ?(???.)=????? ????????/????? ???? ????? ????????:- ???, ?? ???? ???? ?? ??? ??? ????? ??? ????? ???????? ?????????, ?? ????? ?? ??? ?? ???? ???? ??? ??? ???????? ??????? ?????? ??? ????? ????? ????????? ?? ????? ??????? => ????????=?????×???? •1?? ????,?¹ =?¹×?¹=69×0.52=35.88?? •2?? ????,?²=?²×?²=30×0.24=7.2?? •3?? ????,?³=?³×?³=70×0.71=49.7?? ????? ????????=35.88+7.2+49.7=92.78?? ????? ???? ?????=0.52+0.24+0.71=1.47? ???, ?(???)=????? ????????/????? ???? ????? =92.78/1.4 =0.89??/? ????? ??? ??????? ????? ?? ??? ????? ?? 0.89??/?

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