Aptitude - Simplification - Discussion
Discussion Forum : Simplification - General Questions (Q.No. 3)
3.
The price of 10 chairs is equal to that of 4 tables. The price of 15 chairs and 2 tables together is Rs. 4000. The total price of 12 chairs and 3 tables is:
Answer: Option
Explanation:
Let the cost of a chair and that of a table be Rs. x and Rs. y respectively.
| Then, 10x = 4y or y = | 5 | x. |
| 2 |
15x + 2y = 4000
 15x + 2 x |
5 | x = 4000 |
| 2 |
20x = 4000
x = 200.
| So, y = |  |
5 | x 200 |  |
= 500. |
| 2 |
Hence, the cost of 12 chairs and 3 tables = 12x + 3y
= Rs. (2400 + 1500)
= Rs. 3900.
Discussion:
32 comments Page 3 of 4.
Pavan said:
9 years ago
I can't understand, please tell me a simple method.
Naveencool said:
9 years ago
Cost of 10C and 4T is same as 15C and 2T.
Total - 4000 either you buy 10c and 4t or 15c or 2t.
Cost will remain the same.
Now 10c = 2000 and 4t = 2000 so 2000/10 and 2000/4 you will get- 200 and 500 so 12c * 200 and 3t * 500.
Now you get 2400 + 1500 = 3900.
Total - 4000 either you buy 10c and 4t or 15c or 2t.
Cost will remain the same.
Now 10c = 2000 and 4t = 2000 so 2000/10 and 2000/4 you will get- 200 and 500 so 12c * 200 and 3t * 500.
Now you get 2400 + 1500 = 3900.
Shreya said:
9 years ago
I can't find the answer, please help me.
Manikandan.R said:
10 years ago
Please explain clearly steps.
Rajashekar said:
10 years ago
5/2x how?
Sunitha said:
1 decade ago
Am confuse please explain clearly.
Rashmi said:
1 decade ago
10 chairs = 4 tables => 5 chairs = 2 tables....(i)
15 chairs + 2 tables = 4000 (given)
=> 15 chairs + 5 chairs = 4000 from (i)
=> 20 chairs = rs4000
=> 10 chairs = 2000 = 4 tables....(ii)
=> 1 chair = 2000/10=200
=> 12 chairs= 200*12= 2400 and 1 table = 2000/4 from (ii)
=>3 tables=500*3=1500
.
. . 12c+3t = 2400+1500= 3900 (ans).
15 chairs + 2 tables = 4000 (given)
=> 15 chairs + 5 chairs = 4000 from (i)
=> 20 chairs = rs4000
=> 10 chairs = 2000 = 4 tables....(ii)
=> 1 chair = 2000/10=200
=> 12 chairs= 200*12= 2400 and 1 table = 2000/4 from (ii)
=>3 tables=500*3=1500
.
. . 12c+3t = 2400+1500= 3900 (ans).
Manojit said:
1 decade ago
@Lorna
15x+2*5x/2=4000 [2is multiply of 5x/2]
15x+5x=4000
20x=4000
x=4000/20
x=200
15x+2*5x/2=4000 [2is multiply of 5x/2]
15x+5x=4000
20x=4000
x=4000/20
x=200
Lorna said:
1 decade ago
How did they get the 20 that was used 20 divide 4000 ?
Martin said:
1 decade ago
10c=4t
15c+2t=4000
take the cost of c & t is 2000 b'coz 10c + 4t cost is same. and divid 2000 by 10 as well as 4 and get c & t cost as,
1t-500
1c-200
therefore,
12c-2400 + 3t-1500 = 3900.
15c+2t=4000
take the cost of c & t is 2000 b'coz 10c + 4t cost is same. and divid 2000 by 10 as well as 4 and get c & t cost as,
1t-500
1c-200
therefore,
12c-2400 + 3t-1500 = 3900.
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