How to find what percent 120 is of 449.99 (what percent is 120 of 449.99)
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Answer:
Their mass at the start was 400 kg.
Step-by-step explanation:
Given:
The tyres on a car during a grand prix race are reduced in mass by 3%. Their mass is 388 kg at the end of the race.
Now, to find the mass at the start.
<u>Let the mass at the start be .</u>
According to question:
⇒
⇒
⇒
<em>Dividing both sides by 0.97 we get:</em>
⇒
Therefore, their mass at the start was 400 kg.