math help asap a train travels 100 km in the same the plane covers 350km. If the speed of the plane is 20 km per less than 4 times the speed of the train, find both speeds.; Train speed?; planes speed?
ok so 100 times 3.5=350 times 1st equaton by 3.5 350=3.5tr 350=pt sub 3.5tr=pt divide both sides by t 3.5r=p sub p=4r-20 3.5r=4r-20 minus 3.4 from both sides 0=0.5r-20 add 20 20=0.5r times 2 40=r sub p=4r-20 p=4(40)-20 p=160-20 p=140
