Question
The sum of three numbers is 226. If the ratio of the
first to the second is 4:5 and that of second to the third is 7: 10 then the second number is?Solution
Let the three numbers be A, B and C. Now, A:B = 4:5 B:C = 7:10 A: B: C = 28:35:50 A+B+C = 226 28k + 35k + 50k = 226 113k = 226 k = 2 Second number = B = 35 x 2 = 70
In a triangle ABC, a point D lies on AB and points E and F lie on BC such that DF is parallel to AC and DE is parallel to AF. If BE = 4 cm. EF = 6cm. th...
If the 14th term of an arithmetic series is 6 and 6th term is 14, then what is the 95th term?
Find the value of 3/4 cot² 30° + cos² 30°-3cosec²60° + tan² 60°.
Which of the following statements is correct?
I. If x = 12, y = –2 and z = –10, then x³ + y³
+ z³ = 360
II. If x + y = 48 an...
If x2 – 5x + 1 = 0, then find the value of {x2 + (1/x2)}.
What is the square root of the following?
(x² –12x+36) (x² + 8x + 16)
Rs. 25200 is invested in 3 parts in such a way that Simple Interest on 1st Part at 4% per annum for 3 years, Simple Interest on 2nd
If x + y + z = 6, and x3 + y3 + z3 = 36, xyz = 6 then find (xy +yz + zx)?
If for non-zero x, x² - 4x - 1 = 0, what is the value of x² + 1/x²?
If 1/(x+ 1/(y+ 1/z)) = 13/30, then find x+y+z= ?