$\"\"$

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The truck $\"\"$ is travelling twice as fast as truck $\"\"$ .

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The velocity is directly proportional to the distance travelled by the truck.

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Consider the distance $\"\"$ is $\"\"$ , therefore $\"\"$ .

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Here $\"\"$ .

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Pythagoras rule : $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$ .

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The truck $\"\"$ travels $\"\"$ in $\"\"$ .

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Therefore the speed of the truck $\"\"$ is $\"\"$ .

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The speed of the truck $\"\"$ is $\"\"$ .

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Hence the answer is $\"\"$ .

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$\"\"$

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The answer is $\"\"$ .