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laila [671]
2 years ago
15

The ages of Raju and Ravi are in the ratio 3:4 .Four years from now the ratio of their ages will be 4:5 . Find their present age

s.
Mathematics
2 answers:
iragen [17]2 years ago
8 0

Answer:

raju=16 years

Ravi=20 years

Step-by-step explanation:

raju =4×4=16

Ravi=5×4=20

vovikov84 [41]2 years ago
5 0

Answer:

Age of Raju = 12

Age of Ravi = 16

Step-by-step explanation:

Let the Ages of Raju and Ravi be 3x and 4x years

According to question, \frac{3x+4}{4x+4} = \frac{4}{5}

⇒ 5(3x+4)=4(4x+4)

⇒ 15x+20 = 16x+16

⇒ 15x−16x=16 - 20

⇒ −x = −4

⇒ x = 4

Age of Raju = 3 × 4 = 12

Age of Ravi = 4 × 4 = 16

HOPE IT HELPS!!

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At an airport, it cost 7 to park for one hour and 5 per hour for each additional hour.Let x represent the number hours parked.wr
kompoz [17]
The cost of parking is an initial cost plus an hourly cost.
The first hour costs $7.
You need a function for the cost of more than 1 hour,
meaning 2, 3, 4, etc. hours.
Each hour after the first hour costs $5.

1 hour: $7
2 hours: $7 + $5                  = 7 + 5 * 1          = 12
3 hours: $7 + $5 + $5          = 7 + 5 * 2          = 17
4 hours: $7 + $5 + $5 + $5  = 7 + 5 * 3          = 22

Notice the pattern above in the middle column.
The number of $5 charges you add is one less than the number of hours.
For 2 hours, you only add one $5 charge.
For 3 hours, you add two $5 charges.

Since the number of hours is x, according to the problem, 1 hour less than the number of hours is x - 1.

The fixed charge is the $7 for the first hour.
Each additional hour is $5, so you multiply 1 less than the number of hours,
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This can be left as it is, or it can be simplified as

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Check:
For 2 hours: C(2) = 5(2) + 2 = 10 + 2 = 12
For 3 hours: C(3) = 5(3) + 2 = 15 + 2 = 17
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6 0
3 years ago
Find the surface area of the pyramid shown to the nearest whole number.
Snezhnost [94]

Answer:

<h3>The answer is option A</h3>

Step-by-step explanation:

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Since it's a square based pyramid

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Since the square has equal sides

<u>For square base </u>

Area of a square = l²

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From the question l = 5

So we have

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<u>For one of the triangular face</u>

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7 0
3 years ago
23
lianna [129]

Answer:

boi 10x5=50 quick maths

Step-by-step explanation:

6 0
2 years ago
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8 0
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