In scheme A and B, Rs. ‘z’ and Rs. ‘(z+5000)’ were invested at the rate of (R-6)% and ‘R’% per annum on simple interest. After two years, the ratio between the interest obtained from scheme A and B is 91:128 respectively. If Rs. 45000 was invested on compound interest at the rate of (R-2)% per annum compounded annually, then Rs. 31050 was obtained as an interest after 2 years. The value of ‘z’ is what percentage of the value of ‘R’?
If Rs. 45000 was invested on compound interest at the rate of (R-2)% per annum compounded annually, then Rs. 31050 was obtained as an interest after 2 years. 45000 of (100+(R-2))% of (100+(R-2))% = 31050+45000 4.5x(100+(R-2))x(100+(R-2)) = 76050 (100+(R-2))x(100+(R-2)) = 16900 R2+196R−7296=0 R2+(228-32)R−7296=0 R2+228R-32R−7296=0 R(R+228)-32(R+228)=0 (R+228) (R-32) = 0 R = -228, 32 The value of ‘R’ cannot be negative. So R = 32 . In scheme A and B, Rs. ‘z’ and Rs. ‘(z+5000)’ were invested at the rate of (R-6)% and ‘R’% per annum on simple interest. After two years, the ratio between the interest obtained from scheme A and B is 91:128 respectively. (z x (R-6) x 2)/100 : ((z+5000) x R x 2)/100 = 91:128 (z x (R-6) x 2) : ((z+5000) x R x 2) = 91:128 Put the value of ‘R’ in the above equation. (z x (32-6) x 2) : ((z+5000) x 32 x 2) = 91:128 (z x 26 x 2) : ((z+5000) x 32 x 2) = 91:128 (z) : (z+5000) = 7 : 8 8z = 7z+35000 z = 35000 Required percentage = (35000/32)x100 = 109375%
25% of 140 + 2 × 8 = ? + 9 × 5
?2 × 25 = 42 × 21 + 172Â
?% of 320 - 69 = 123
18 × 15 + 86 – 58 =? + 38
Â
3.3 Times 2/27 of 40% of 364=?
(25)² × 4 ÷ 5 + (3)³ + 48=? + 425
4368 + 2158 – 596 - ? = 3421 + 1262
`(450 -: ?)/(2.5 xx 1.2)` = 250
(2 ÷ 3) × (4 ÷ 12) × (? ÷ 10) × 45 × (1 ÷ 5) = (? ÷ 6) + (2 ÷ 5)
Solve the following:
523 + 523 x 523 ÷ 523