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
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Ques:- Find the area of a square field whose diagonal of length 20 m?
Recent Answer : Added by KHUSHI UJJAWAL On 2022-05-17 09:08:34:
Diagonal of square=1.414* a, where a is side of square.
ans=1.414*20
ans=28.28
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Ques:- 5 men or 8 women do equal amount of work in a day. a job requires 3 men and 5 women to finish the job in 10 days how many woman are required to finish the job in 14 days.a) 10b) 7 c) 6 d) 12
Recent Answer : Added by Admin On 2022-09-28 17:23:05:
7days
Ques:- Mr. Rahul spends 30% of his monthly salary on domestic expenses. He spends respectively 20% and 10% of the remaining salary on education of children and conveyance. Of the remaining amounts now he spends respectively 20% and 30%on entertainment and maintenance of house. He saves Rs.5512.50. what is the monthly salary of Mr. Rahul?
A. Rs. 22,500
B. Rs. 20,000
C. Rs. 25,000
D. Rs. 24,500
E. None of these
Recent Answer : Added by Admin On 2020-05-17 12:03:47:
How it is possible ? Please write in detail !!! This answer
s not a use !!!
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Ques:- You have 5 jars of pills. Each pill weighs 10 gram, except for contaminated pills contained in one jar, where each pill weighs 9 gm. Given a scale, how could you tell which jar had the contaminated pills in just one measurement?
Recent Answer : Added by Admin On 2020-05-17 12:01:47:
Take 5 pills from jar 1, 4 pills from jar2,…. and 1 pill
from jar 5 and put altogether in the scale. the ideal
weight should be (1+2+3+4+5)x10= 150gms. for eg if the jar2
is contaminated then the weight will be 146 gms. so
depending on the amount of weight loss we can identify the
contaminated jar.
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Recent Answer : Added by jeevi sireesha On 2022-11-29 17:06:55:
4
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Recent Answer : Added by padmavathy On 2022-04-02 06:58:14:
south east
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Ques:- If you had an infinite supply of water and a 5 quart and 3 quart pail, how would you measure exactly 4 quarts?
Recent Answer : Added by Admin On 2020-05-17 12:01:39:
first fill 3quart pail and pour in 5quart pail.fill again 3
quart pail and fill remaining 2 quarts in 5 quart
pail.hence 1 quart remains in 3quart pail.empty 5quart pail
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Ques:- A started at 9.00 am with 6 mph and B started at 9.30 am with 8mph in the same direction. At what time they will meet?
Recent Answer : Added by DK BOSS On 2021-07-16 09:52:53:
A’s speed=6 mph ,B’s speed=8 mph
Let, after x hrs, they will meet.
so, the distance traveled by A in x hrs should be the same as the distance traveled by B in (x-1/2)hrs [as B started the journey after 30 min of A]
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=>8x-6x=4
=>2x=4
=>x=2
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A. 12
B. 18
C. 17
D. Cannot be determined
E. None of these
Recent Answer : Added by satyaSamareddy On 2023-05-08 10:21:52:
12
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Ques:- In a team of 12 persons, 1/3 are women and 2/3 are men. To obtain a team with 20% women how many men should be hired?
Recent Answer : Added by Admin On 2020-05-17 12:00:23:
12(1/3) = 4 so women = 4
==>men = 12-4 = 8
if team needs 20% of women then men Will be 80%
consider u want to hire “x” men
so,
(12+x)(80/100) = 8 + x
so, x= 8
Ques:- A can copy 50 papers in 10 hours while both A & B can copy 70 papers in 10 hours. Then for how many hours required for B to copy 26 papers?
Recent Answer : Added by Admin On 2020-05-17 12:04:30:
A can copy 50 papers in 10 hrs
that means 5 papers in 1 hour
A & B can copy 70 papers in 10 hrs
that means both of them copy 7 papers in 1hour
we know A can copy 5 papers
there fore B can copy 2papers in 1 hour
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2*x=26
x=26/2=13 hours
Ques:- Why do u want to change the job?
Ques:- I am concerned that you do not have as much experience as we would like in?
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