A rocket flies at a speed of $2.6 \times 10^{7}$ m/s . If the speed of a jet is $130000$ m/s, then the rocket's speed is _____ times the speed of the jet.

240

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2400

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200

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2000

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Solution

The correct option is C 200
$\frac{Speed of the rocket}{Speed of the jet} = \frac{2.6 \times 10^{7}}{130000}$

$= \frac{2.6 \times 10^{7}}{1.3 \times 10^{5}}$

$= \frac{2.6}{1.3} \times 10^{7 - 5}$

$= 2 \times 10^{2} = 200$

Thus, the speed of rocket is 200 times that of the jet.

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A rocket flies at a speed of 2.6×107 m/s . If the speed of a jet is 130000 m/s, then the rocket's speed is _____ times the speed of the jet.

The correct option is C 200Speed of the rocketSpeed of the jet=2.6×107130000 =2.6×1071.3×105 =2.61.3×107−5 =2×102=200 Thus, the speed of rocket is 200 times that of the jet.

A rocket flies at a speed of $2.6 \times 10^{7}$ m/s . If the speed of a jet is $130000$ m/s, then the rocket's speed is _____ times the speed of the jet.

The correct option is C 200
$\frac{Speed of the rocket}{Speed of the jet} = \frac{2.6 \times 10^{7}}{130000}$

$= \frac{2.6 \times 10^{7}}{1.3 \times 10^{5}}$

$= \frac{2.6}{1.3} \times 10^{7 - 5}$

$= 2 \times 10^{2} = 200$

Thus, the speed of rocket is 200 times that of the jet.