Question

During a Grand Prix car race, the tyres on a car are reduced in mass by 3%. If their mass is 388 kg at the end of the race, what was their mass at the start?

Answer 1

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.

Let the mass at the start be $x$.

According to question:

$x - 3 \%ofx= 388$

⇒$x-\frac{3}{100}\times x = 388$

⇒$x-0.03x =388$

⇒$0.97x=388$

Dividing both sides by 0.97 we get:

⇒$x=400$

Therefore, their mass at the start was 400 kg.