eddy2017
Elite Member
- Joined
- Oct 27, 2017
- Messages
- 2,525
Hi,
Greg has just started a new job at a grocery store down the road. He lives within walking distance of it. It takes him 20 minutes to walk there. He lives 2/3 of a mile from the store. Sometimes he rides his bike there instead, and it takes him only half as much time to get there.
Greg wants to know his speed in MPH when he is walking and his speed in MPH when he is riding his bike.
Calculate the speed in each case. Write your answers with walking speed first, followed by the bike riding speed.
WIK ( What I know)
it takes Greg 20 minutes to get to his job when he walks over.
it takes him half as much time when he bikes over=10 minutes.
speed in mph when walking?
speed in mph when riding his bike.
when he walks
S=d/t
S=(2/3)of a mile / 20 mts
S=92/3)/(20/1)
s=(2/3)(1/20)
S=(2)(1)/(3)(20)
S=2/60 reducing
S=1/30
S=0.033 mph
His speed when walking is 0.033 mph
when riding a bike,
S=d/t
s=(2/3)of a mile / 10 mts
s=(2/3)/(10/1)
=(2/3) (1/10)
=2/30
=1/5
=0.066
His speed when riding his back to work is 0.066 mph.
Is this ok?
Thanks in advance for corrections and tips.
Greg has just started a new job at a grocery store down the road. He lives within walking distance of it. It takes him 20 minutes to walk there. He lives 2/3 of a mile from the store. Sometimes he rides his bike there instead, and it takes him only half as much time to get there.
Greg wants to know his speed in MPH when he is walking and his speed in MPH when he is riding his bike.
Calculate the speed in each case. Write your answers with walking speed first, followed by the bike riding speed.
WIK ( What I know)
it takes Greg 20 minutes to get to his job when he walks over.
it takes him half as much time when he bikes over=10 minutes.
speed in mph when walking?
speed in mph when riding his bike.
when he walks
S=d/t
S=(2/3)of a mile / 20 mts
S=92/3)/(20/1)
s=(2/3)(1/20)
S=(2)(1)/(3)(20)
S=2/60 reducing
S=1/30
S=0.033 mph
His speed when walking is 0.033 mph
when riding a bike,
S=d/t
s=(2/3)of a mile / 10 mts
s=(2/3)/(10/1)
=(2/3) (1/10)
=2/30
=1/5
=0.066
His speed when riding his back to work is 0.066 mph.
Is this ok?
Thanks in advance for corrections and tips.