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Solving a Quadratic Equation by Factorization Method

Find the dist...

Question

Find the distance covered by a car moving at $20 m / s$ for $3 h$ .

A

220 k m

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B

218 k m

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C

216 k m

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D

230 k m

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Solution

The correct option is D $216 k m$
Given speed of car = 20 m/s
Time taken = 3h
then
speed = $\frac{d i s t a n c e}{t i m e}$
$20 = \frac{D}{3 \times 60 \times 60}$
$D = 2 \times 3 \times 6 \times 6 \times 1000$
$D = 72 \times 3 k m$
D= 216 km

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