A manufacturer has 600 L of a 12% solution of acid. How many litres of a 30% acid solution must be added to it so that the acid content in the resulting mixture will be more than 15% but less than 18%?
a polygon has 44 diagonals.find the no. of its sides.
an object dropped from cliff falls with a constant acceleration of 10m/s2 find its speed after 2s after it was dropprd
Q. Solve graphically:- 3y-2x<4, x+3y>3, x+y<equals 5.
in how many ways can the letters of the word FRACTION be arranged so that no two vowels are together.
if 22Pr+1:20pr+2 = 11:52 find r
15x less than 73, where (i)x belongs to N and (ii) Z.
solve the inequation and represent the solution set on the number line.
a scooter covers 20km/h at a uniform speed of 30km/h what should be its speed for the next 40 km if the average speed is 60km/h
if log0.3(x-1) < log0.09(x-1), then x lies in the interval....
all pairs of consecutive even positive integers, both of which are
larger than 5 such that their sum is less than 23.
if n-1cr:ncr:n+1cr=6:9:13 find n and r
an object moves along a straight line with an acceleration of 2m/s2 if its initial speed is 10m/s what will be its speed 5s later
how to solve:
log2 [ x-5 /2x-3 }2 <0
if all permutations of the letters of the word INDIA are arranged as in a dictionary what is the 60th word?
how to solve modulus (2x - 1/x - 1)>2?
A plumber can be paid under 2 schemes as given below:-
I : $600 and $ 50 per hour.
II: $ 170 per hour .
If the job takes n hours, what values of n does Scheme I give the plumber better wages?
While drilling a hole in the earth, it was found that the temperature (TC) at x km below the surface of the earth was given by
T = 30 + 25(x - 3), when 3 ≤ x ≤ 15.
Between which depths will the temperature be between 200C and 300C?
a milk of 80% conc. is diluted at home by the seller by adding some water to it so that milk conc. is reduced btw 65% to 70% . if 640 l of milk of 80% conc. is available how much water has been added??
Solve the following system of inequalities graphically
2x +y ≤ 24 ,
x +y ≤ 11 ,
2x + 5y ≤ 40 ,
x ≥0 , y ≥ 0
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