easy, if you use your head and a shortcut
d=rt
d/r=t
d/t=r
basically if given 2 of the, you can find the rest with
d=rt
t=d/r
r=d/t
2. speed=r
d=3600m
t=12
r=d/t
r=3600m/12m
r=300m/min
rate=300m per minute
3. the time is 7 hours
speed =11mph=r
d=rt
d=7h times 11mph
d=77miles
4. given
d=300cm
r=2cmpermin
t=d/r
t=300cm/2cmpermin
t=150min
5. r=45mph
t=6h
d=rt
d=45mph times 6h
d=270miles
6. d=400yd
t=20min
r=d/t
r=400yd/20min
r=20yd/min
r=20yards per minute
7. r=120mph
t=10h
d=rt
d=120mph times 10h
d=1200miles
8. d=700ft
t=50min
r=d/t
r=700ft/50min
r=14ft/min
r=14 feet per minute
9. d==1200mi
r=600mph
t=d/r
t=1200mi/600mph
t=2h
t=2 hours
10. speed limit is 65mph=r
d=195miles
t=?
t=d/r
t=195mi/65mph
t=3 hours
11. 2 ways
1. find how far it travels in 4 hours
2. find how long it will take
both easy, I willl do first
in 4 hours
d=rt
d=4h times 65mph
d=260 miles
260mi>230mi
yes
