Roni and Willy had a 100m race. Roni covered the distance in 45 sees and Willy covered the distance in 36 secs. Willy beats Roni by how much distance? - IQ786

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Roni and Willy had a 100m race. Roni covered the distance in 45 sees and Willy covered the distance in 36 secs. Willy beats Roni by how much distance?

Roni and Willy had a 100m race. Roni covered the distance in 45 sees and Willy covered the distance in 36 secs. Willy beats Roni by how much distance?

20m

22.5m

25m

None of these

Roni's speed:Speed of Roni=100 m / 45 s=20/9 m/s

Explanation

Roni covers 100 meters in 45 seconds.
Willy covers 100 meters in 36 seconds.

Roni's speed:
$Speed of Roni = 100 m / 45 s = 20 m/s$
Distance Roni covers in 36 seconds:
$Distance = Speed \times Time = 20/9 \times 36 = 80 m$
Since Willy finishes the race (100 m) when Roni has only covered 80 m, Willy beats Roni by:
$100 - 80 = 20 m$