0Brittany0
06.10.2019 •
Mathematics
Kaveri has a total rs 590 as currency notes is the denominations ofrs50 , rs 20 , and rs 10 . the ratio of the number of rs 50 note and rs 2o is 3: 5. if she has a total of 25 notes , how many notes of each denomination she has?
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Ответ:
x = number of rs 50
y = number of rs 20
z = number of rs 10
Because there are 25 total notes,
x + y + z = 25 (1)
The ratio of rs 50 to rs 20 is 3:5, therefore
x = 0.6y (2)
The total amount is rs 590, therefore
50x + 20y + 10z = 590
or
5x + 2y + z = 59 (3)
Subtract (1) from (3).
4x + y = 34 (4)
Substitute (2) into (4).
4*(0.6y) + y = 34
3.4y = 34
y = 10
From (2), obtain
x = 6
From (1), obtain
z = 25 - 6 - 10 = 9
Kaveri has
6 rs 50 notes,
10 rs 20 notes,
9 rs 10 notes.
Ответ:
y=4.47 and x=√10
Step-by-step explanation:
180°-45°-90°=45°
√10/(sin 45°)=y/(sin 90)
y=4.47
√10/(sin 45°)=x/(sin45)
x=√10