Question

2 Convert each of the following speed into km/hr:

(i) 45 m/sec       =   45 X 18 /5 = 162 km/hr

(iv) 2.8 m/sec    

(v) 22.5 m/sec

(vi) 120 m/sec

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Answer 1

Answer:

Additionalknowledge

Knowledge about Quadratic equations -

★ Sum of zeros of any quadratic equation is given by ➝ α+β = -b/a

★ Product of zeros of any quadratic equation is given by ➝ αβ = c/a

★ A quadratic equation have 2 roots

★ ax² + bx + c = 0 is the general form of quadratic equation

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Answer 2

Answer:

IV. 2.8m/Sec = 2.8×18/5 = 10.0km/hr

V. 22.5m/sec = 22.5×18/5 = 81 km/hr

VI. 120m/sec = 120×18/5 = 432km/hr

PLZ MARK AS BRAINLIEAST

Step-by-step explanation:

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