Ques:- X, Y and Z rents a pasture for Rs.870. X put in 12 horses for 8 months, Y 16 horses for 9 months and Z 18 horses for 6 months. How much should C pay?
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:- Perimeter of the back wheel = 9 feet, front wheel = 7 feet on a certain distance the front wheel gets 10 revolutions more than back wheel . what is the distance?
Recent Answer : Added by Admin On 2020-05-17 11:59:15:
If n = no. of revolutions for back wheel
9n = 7n + 10*7
n=315
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Ques:- Some persons decide to raise Rs. 3 lakhs by equal contribution from each of them. If they contributed Rs. 50 extra each, the contribution increased to Rs. 3.25 lakhs. How many persons were there ?
A. 400
B. 500
C. 600
D. 700
E. None of these
Recent Answer : Added by BINDHU REDDY On 2021-08-09 01:51:48:
500
Ques:- 78 x 14 + 7645 ? ? = 8247
A. 580
B. 590
C. 490
D. 480
E. None of these
Recent Answer : Added by Kartika Vijh On 2021-08-13 07:13:19:
c
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Recent Answer : Added by Anonymous On 2021-08-11 07:22:43:
5x/4
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Ques:- When x is real what is the least value of (x**2-6*x+5)/(x**2+2*x+1)
Recent Answer : Added by Admin On 2020-05-17 12:01:23:
(x**2 – 6* x + 5) = (x-1)*(x-5)
(x**2 + 2 * x + 1) = (x + 1) * (x+1) = (x+1)**2
For what x is (x-1)*(x-5)/( (x+1)**2) a minimum?
One way to answer this question is by using calculus.
Take the derivative, and set to zero.
Since this is a fraction of polynomials, and a fraction is
zero only if it’s numerator is zero, we need calculate only
the numerator of the derivative and set it to zero.
The numerator of the
Derivative of (x-1)*(x-5)/( (x+1)**2) is
( (x-1) + (x-5) ) ( x+1)**2 – (x-1)(x-5)( 2 (x+1) )
= (2 x – 6) (x+1)**2 – (2) (x-1)(x-5) (x+1)
= 0
Divide through by 2 (x+1)
(x-3)(x+1) – (x-1)(x-5) = 0
(x**2 – 2 x – 3 ) – (x**2 – 6 x + 5) = 0
x**2 – x**2 – 2 x + 6 x – 3 – 5 = 0
4 x – 8 = 0
x = 2
Plugging in x = 2 into the original
(x**2-6*x+5)/(x**2+2*x+1)
gives us (2**2 – 6 * 2 + 5)/(2**2 + 2*2 + 1)
= (4 – 12 + 5) / (4 + 4 + 1) = -3/9 = -1/3
Least value is -1/3
Ques:- The radius of a circular wheel is 1.75 m, how many revolutions will it make in traveling 1 km?
Recent Answer : Added by Shaikot On 2021-06-23 17:55:45:
(10×1000) / (2×3.1416×1.75) = 909 times (about)
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Recent Answer : Added by mohammed shahnawz On 2022-08-14 16:45:52:
mr, blue was compplete the contract in 12 days
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A. Sunday
B. Tuesday
C. Thursday
D. Friday
Recent Answer : Added by Anand On 2022-05-17 09:08:12:
sunday
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B. 19 only
C. both 11 and 19
D. neither 11 nor 19
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11
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Recent Answer : Added by tony On 2022-01-17 15:32:27:
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Recent Answer : Added by deepti On 2021-05-28 08:49:33:
1
Ques:- A husband and wife has a combined age of 91.the husband is now twice as old as his wife was when he was as old as she is now. How old are they?
Recent Answer : Added by Admin On 2020-05-17 12:04:21:
ans is C.
let H be present age of husaband.W be present age of wife.
H+W=91.
now let diff between their ages be x.that is H-W=x.
now when husband is W yaers old, his wife must be W-x years
old.and it is given that H=2(W-x). so 2W-H=2x. and H-
W=x.eliminating x we get 4W=3H. but H+W=91, so solving thse
two H=52 W=39.
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Recent Answer : Added by Sudeshna Roy On 2022-08-24 17:03:04:
Options:
A) EDRIRL
B) DCQHQK
C) ESJFME
D) DEQJQM
Ans: A)
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Recent Answer : Added by dilshad On 2021-03-26 17:27:29:
Indira Gandhi
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Recent Answer : Added by Kenneth R On 2022-08-14 16:46:03:
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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