The driver of a car moving with uniform speed of 40ms-1 observes a truck approaching...

WAEC 2000

The driver of a car moving with uniform speed of 40ms-1 observes a truck approaching from the opposite direction with a speed of 20ms-1. Calculate the speed of the car relative to that of the truck

A. .5ms^-1
B. 2.0ms^-1
C. 20.0ms^-1
D. 60.0ms^-1

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Correct Answer: Option D

Explanation

Let V\(_t\) = velocity of truck, = 20m/s V\(_c\) = velocity of car = 40m/s

\(_cV_t\) = V\(_t\) - V\(_c\) = 40 -(-20) = 40 + 20 = 60m/s

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The driver of a car moving with uniform speed of 40ms-1 observes a truck approaching...

Correct Answer: Option D

Explanation

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