Question
If Simple Interest is 12.5% more than the principal and
number of years(n), rate(r) are numerically in the ratio 2 : 1, then find the values of n, r.Solution
Let principal =100 Then SI =100+12.5 =112.5 Given the ratio of time and rate =2:1 Time =2x and rate =x Now using formula of -SI =PRT/100 112.5 = (100×2x × x)/100 x2 =112.5 /2 =1125/20 x2 =225/4 x =15/2 =7.5 And time =2×7.5 =15years
If p = 24 - q - r and pq + r(q + p) = 132, then find the value of (p² + q² + r²).
((99.9 - 20.9)² + (99.9 + 20.9)² )/(99.9 x 99.9 + 20.9 x 20.9) = ?
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Find the value of the given expression-
(4x+4 -5× 4x+2) / 15×4x – 22×4x
If 4x² + y² = 40 and x y = 6, then find the value
of 2x + y?
If p = 40 - q - r and pq + r(q + p) = 432, then find the value of (p² + q² + r²).
47.98 × 4.16 + √325 × 12.91 + ? = 79.93 × 5.91
If x + y = 4 and (1/x) + (1/y) = 24/7, then the value of (x3 + y3).
- If p = 20 - q - r and pq + r(p + q) = 154, then find the value of (p² + q² + r²).
If a = (√2 - 1)1/3, then the value of (a-1/a)3 +3(a-1/a) is: