Ques:- A certain type of mixture is prepared by mixing brand A at Rs.9 a kg. with brand B at Rs.4 a kg. If the mixture is worth Rs.7 a kg., how many kgs. of brand A are needed to make 40kgs. of the mixture?
Recent Answer : Added by Admin On 2022-09-29 17:39:56:
Answer:
24
Step-by-step explanation:
A + B = 40.
And at Rs 7 a kg for 40 kg, you want a total of Rs.280.
So the second equation is 9A + 4B = 280
From the first equation: B = 40 – A
and sub into the second equation:
9A + 4(40-A) = 280
9A + 160 – 4A = 280
5A = 120
A = 24.
And you should check: B should equal 40-24 = 16. Check with the final equation: 9*24 + 4*16 = 216 + 64 = 280. So it works.
Your answer, of course, is A = 24
Ques:- At a special sale, 5 tickets can be purchased for the price of 3 tickets. If 5 tickets are purchased at the sale, the amount saved will be what percent of the original price of the 5 tickets?
A. 20%
B. $$33$$$$1 / {3}$$%
C. 40%
D. 60%
Recent Answer : Added by narendra On 2022-09-18 09:03:10:
C
Ques:- Sir, My educational details: xth in 1992 with 75.4% inter in 1994 with 53.4% B.Tech.,in 2004 with 65.5%and also having certifications like MCP & MCSAI am going to apply for the post.You satisfied with your academic results?
Ques:- DO YOU THINK YOU ARE A TRUE ENGINEER
Ques:- A clerk multiplied a number by ten when it should have been divided by ten.The ans he got was 100.what should the ans have been?
Recent Answer : Added by Admin On 2020-05-17 12:01:36:
Let the number be X,
Instead of dividing the number by 10, i.e.,X*10.
he got the result as 100,
so, (X*10)=100
X=100/10
X=10.
BUt he has to divide X by 10,
so, X/10=10/10=1.
obviously the answer is 1.
Ques:- A train sets off at 2 p.m. at the speed of 70 kmph. Another train starts at 3:30 p.m. in the same direction at the rate of 85 kmph. At what time the trains will meet?
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Ques:- In a library, there are two racks with 40 books per rack. On a given day, 30 books were issued. What fraction remained in the racks?
Recent Answer : Added by Admin On 2020-05-17 12:00:27:
TOTAL NUMBER OF BOOKS 40+40=80
ISSUED BOOKS 30
REMAINING BOOKS 80-30=50
RATE=50/80=5/8
Ques:- I am living in water.if cut my head im in front ur door.if u cut my tail im a fruit and if u cut both head and tail im with u.what is this?
Recent Answer : Added by akankshya mangsule On 2022-03-09 16:33:39:
Pearl.. Head cut then earl.. tail cut then pear.. Head and tail cut then ear
Ques:- How much experience you have as quality control Engineer?
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Ques:- If an item costs Rs.3 in '99 and Rs.203 in '00.What is the % increase in price?(a) 200/3 %(b) 200/6 %(c) 100%(d) none of these
Recent Answer : Added by divya On 2022-11-14 17:04:22:
200/3
Ques:- If two dies are thrown simultaneously what is the prob. of one of the dice getting face 6 ?
Recent Answer : Added by Admin On 2020-05-17 12:03:10:
sample space=36
prob of one of the dice getting face 6
i.e n={(1,6)(2,6)(3,6)(4,6)(5,6)(6,1)(6,2)(6,3)(6,4)
(6,5)(6,6)}=11
p=n/s
p=11/36
ans:11/36
Ques:- Pairs of primes separated by a single number are called prime pairs. Examples are 17 and 19. Prove that the number between a prime pair is always divisible by 6.
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Ques:- Showing the man receiving the prize, Saroj said, “He is the brother of my uncle’s daughter.” Who is the man to Saroj?
Recent Answer : Added by Stephen chibuike Joel On 2022-03-09 16:40:01:
Cousin
Ques:- Can you work outside kolkata ?
Ques:- The banker’s discount on Rs. 1600 at 15% per annum is the same as true discount on Rs. 1680 for the same time and at the same rate. What is the time?
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Ques:- When an object like cube or sphere is seen along x,y,z,axes we get the same.Apart from these suggest another which has similar characteristics?
Recent Answer : Added by Admin On 2020-05-17 12:01:27:
Triangular Prism
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Ques:- The ratio of the number of ladies to gents at a party was 1:2 but when 2 ladies and 2 gents left, the ratio became 1:3. How many people were at the party originally?
Recent Answer : Added by MANISHA KALWAR On 2022-01-08 16:07:02:
12
Ques:- The number of prime numbers between 0 and 50 is
A. 14
B. 15
C. 16
D. 17
Recent Answer : Added by narendra On 2022-09-18 09:02:10:
b
Ques:- An integer us divisible by 16 if and only if its last X digits are divisible by 16. The value of X would be
A. 3
B. 4
C. 5
D. 6
Recent Answer : Added by Renu On 2022-08-14 16:25:04:
4
Ques:- In a Park, N persons stand on the circumference of a circle at distinct points. Each possible pair of persons, not standing next to each other, sings a two-minute song ? one pair immediately after the other. If the total time taken for singing is 28 minutes, what is N?
Recent Answer : Added by Admin On 2022-09-29 18:42:28:
Total number of pairs is NC2^{N}C_2NC2. Number of pairs standing next to each other = N. Therefore, number of pairs in question = NC2^{N}C_2NC2 – N = 28/2 = 14. If N = 7,
7C2 – 7 = 21 – 7 = 14….
N =7
Ques:- The smallest prime number greater than 1000 is
A. 1001
B. 1003
C. 1009
D. 1007
Recent Answer : Added by Akinwunmi Gbemisola On 2022-05-17 09:08:46:
Answer:
24
Step-by-step explanation:
A + B = 40.
And at Rs 7 a kg for 40 kg, you want a total of Rs.280.
So the second equation is 9A + 4B = 280
From the first equation: B = 40 – A
and sub into the second equation:
9A + 4(40-A) = 280
9A + 160 – 4A = 280
5A = 120
A = 24.
And you should check: B should equal 40-24 = 16. Check with the final equation: 9*24 + 4*16 = 216 + 64 = 280. So it works.
Your answer, of course, is A = 24