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JAMB Mathematics 2023 Paper

Question : 11

Total: 80

Solution:

Concept:

When speed is constant, the distance covered is directly proportional to the time taken.

Explanation:

First, determine the constant speed using the first set of values.

Speed

= \dfrac{\text{Distance}}{\text{Time}} = \dfrac{225}{4.5}

This gives a speed of

50

km/h.

Now, use the same speed to find the time required for

150

km.

Time

= \dfrac{\text{Distance}}{\text{Speed}} = \dfrac{150}{50}

Time

= 3

hours.

Therefore, the car will take 3 hours to travel 150 km.

Answer:

C. 3 hrs

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