B invests 30% of his monthly salary on Travelling and 20% of remaining on Food. Again, he invested 25% of the remaining (after travelling and food expenses) on Rent. If he invested Rs. 8,400 on Rent and Food, then find his monthly salary.
Let monthly salary of B = 100x Amount invested on Travelling = (30/100) × 100x = 30x Remaining amount = 100x – 30x = 70x Amount invested on Food = (20/100) × 70x = 14x Remaining amount = 70x – 14x = 56x Amount invested on Rent = (25/100) × 56x = 14x ATQ, => (14x + 14x) = 8400 => x = 300 Therefore, monthly salary of B = 100 × 300 = Rs. 30,000
I. y/16 = 4/y
II. x3= (2 ÷ 50) × (2500 ÷ 50) × 42× (192 ÷ 12)
I. 2 x ² + x – 1 = 0
II. 2 y ² - 3 y + 1 = 0
...I. 96x² + 52x - 63 = 0
II. 77y² + 155y + 72 = 0
The quadratic equation (p + 1)x 2 - 8(p + 1)x + 8(p + 16) = 0 (where p ≠ -1) has equal roots. find the value of p.
I. x2 = 10
II. y2 - 9y + 20 = 0
...I. x² + 11x + 24 = 0
II. y² + 17y + 72 = 0
I. 117x² + 250x + 117 = 0
II. 54y² -123y + 65 = 0
I. 2x2 + 12x + 18 = 0
II. 3y2 + 13y + 12 = 0
If 4x = 40, 3y = 33, what is the value of 6x + 4y?
I. 8x – 3y = 85
II. 4x – 5y = 67
