A train travels 190 kilometers in 3.0 hours, and then 120 kilometers in 2.0 hours. What is its average speed?
2007-03-07 15:31:41 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Physics
average speed is total distance divided by total time
(190km + 120km) / (3.0h + 2.0h)
(310km) / (5h)
62km/h is average speed
2007-03-07 15:41:54 · answer #1 · answered by meh. 2 · 0⤊ 0⤋
average speed = total distance/total time
average speed = (190 + 120 kilometers)/(3+2 hours)
average speed =310 kilometers/ 5 hours
average speed = 62 kilometers/hour
2007-03-07 23:39:50 · answer #2 · answered by eric l 6 · 0⤊ 0⤋
190+120=310. 3+2=5
310/5=62.
62km/h
^^ i learned this year in middle school.
2007-03-08 00:21:53 · answer #3 · answered by DBSG/SS501_fan 2 · 0⤊ 0⤋
see if ti takes 120 in 2 hours then it will take 180 in 3hours so in one hour it takes 60kilometre.
the average speed formulae is distance(km) x time(h)
2007-03-07 23:38:28 · answer #4 · answered by jay gal 3 · 0⤊ 0⤋