1.John spends one-third of money to buy a toy.Then he spends $20 for food.If he spends $37 in total,how much money does he have at the belonging?
Let the money he has at the beginning be $x.
A car is travellingat a speed of v m/s.
2a What is the distance travelled by the car in t seconds?
2b Find the distance travelled by the car at a speed of 210m/s in one and a half minutes?
3.We can do arithmetic operations for directed numbers of fractions.
F.1 Maths
2007-08-31 1:21 am
回答 (3)
2007-08-31 1:32 am
✔ 最佳答案
1. x/3 + 20 =37x/3=17
x=51
2a. distance = time x velocity
=vt
2b. distance=vt=210 x 90 (since the velocity is in meter per second, we need to change the 1.5 minutes into 90 seconds)
=18900m
比心機讀書啦
2007-08-31 1:39 am
1.
1/3X + 20 = 37
1/3X = 17
X = 51
2a.
v m
2b.
210 m/s X 1-1/2 min
=210 m/s X 90 s
=18900 m
1/3X + 20 = 37
1/3X = 17
X = 51
2a.
v m
2b.
210 m/s X 1-1/2 min
=210 m/s X 90 s
=18900 m
2007-08-31 1:37 am
1) Let the money he has at the beginning be $x
money to buy a toy=37-20=17
one-third of money =17
therefore:
the money he has at the beginning
= 17x3
=$51
2a)distance travelled by the car = (v)(t)
2b)
speed=v=210m/s
time=t=a half minutes=30s
therefore:
distance travelled by the car
=vt
=(210)(30)
=6300m
=6.3Km
3) 唔係問題, 所以冇答案.
Shadow.
money to buy a toy=37-20=17
one-third of money =17
therefore:
the money he has at the beginning
= 17x3
=$51
2a)distance travelled by the car = (v)(t)
2b)
speed=v=210m/s
time=t=a half minutes=30s
therefore:
distance travelled by the car
=vt
=(210)(30)
=6300m
=6.3Km
3) 唔係問題, 所以冇答案.
Shadow.
收錄日期: 2021-04-13 19:57:15
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