Quadratic equation refers to polynomial equation that have a general form of ax2+bx+c=0, where a, b and c are co-efficient. a≠0 otherwise it would be a linear equation and c is constant. The quadratic formula is defined as x= (-b±√b2-4ac)/2a, where “a” is the co-efficient of the x2, b is the linear co-efficient of the x and c is the constant term. Therefore, the quadratic formula involves substituting the co-efficient from a given quadratic equation into the formula.
If diameter of cylinder is 8cm and its height is 16cm then volume of cylinder is (a) 804.352cm³ (b) 1000cm³ (c) 900cm³ (d) 850cm³
If volume of cylinder is 900cm² with height of 20cm then diameter of cylinder is (a) 24cm² (b) 7.57cm² (c) 9.57cm² (d) 12.23cm²
If a rectangular tank is 21cm long, 13cm wide and 18cm high and contains water up to a height of 11cm then total surface area is (a) 1450cm² (b) 1350cm² (c) 1200cm² (d) 1021cm²
If circular metal sheet is 0.65cm thick and of 50cm in diameter is melted and recast into cylindrical bar with 8cm diameter then length of bar will be (a) 24.41cm (b) 35.41cm (c) 40.41cm (d) 30.41cm
If a cuboid is 3.2 cm high, 8.9cm long and 4.7 wide then total surface area is (a) 170.7cm² (b) 180cm² (c) 205.7cm² (d) 325.8cm²
