Column I Column II (A) Circular plate is expanded by heat from radius 5 cm to 5.06 cm. Approximate increase in area is (p) 4 0.6 (B) Side of cube increasing by 1%, then percentage increase in volume is (9) (r) 3 (C) If the rate of decrease of- 2r + Sis twice the rate of decrease of x, then x is equal to 3/3 (D) Rate of increase in area of equilateral triangle of side 15 cm, when each side is increasing at the rate of 0.1 cm/s; is (s) 4.

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Differential Equations

Have you ever observed the movement of the satellites and rockets or how the planets go around the sun in their orbits? How will you determine their motion? Definitely they follow some scientific laws and these kinds of problems are framed as differential equations.