Question

In a short distance motorcar racing event, Car 1 completes 100 metres in 3.54 seconds and Car 2 completes the same distance by 2.758 seconds. Which car won the race and by how many seconds?

• A. Car 2 won the race by 0.782 seconds.
• B. Car 2 won the race by 2.758 seconds.
• C. Car 1 won the race by 0.782 seconds.
• D. Car 1 won the race by 3.54 seconds.

Answer 1

The correct option is A Car 2 won the race by 0.782 seconds.

First, we must determine who won the race and then by how much.
$\Rightarrow$The racer who covers the distance in the shortest amount of time is the fastest.

Comparing the time required by aligning the decimal point,

$3.54$
$2.758$

During comparison, we start with the digit at the extreme left.

$\underset{–}{3}.54$
$\underset{–}{2}.758$
When we compare the tens place digit, we find that 3>2.
Hence, 3.54 is larger than 2.758.

As Car 2 took less time, Car 2 is the winner.

To determine by how many seconds Car 2 won the race, subtract Car 2's time from Car 1's. $\Rightarrow 3.54-2.758$

As a result, Car 2 won the race by 0.782 seconds.