book Maths Puzzle Numerical Ability

{{{1.4x^2+4.9x+2.6=0}}}

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book Other Question

What are the length and width of a rectangle that has a perimeter of 98 cm and a diagonal of 35 cm? A invests $10,000 for 6 monts, B invests $8,000 for 5 months and C invests $5,000 for a year. What is B's share in a total profit of $12,000?