Question

Hey people, its your boi UnknownDude!

Here's a question to jog your brain muscles.

There is a 100 m race between A, B and C.

A beats B by 10 m.

B beats C by 10 m.

By how much did A beat C?

Disclaimer: The answer is NOT 20 m. So put in a little thought and tell me the answer with your working.

Use that brain, and stay awesome!

Answer 1

100m race
I.e a=100m b=90m
B beats c by 10m
I.e b=100m c=90m
Now when b was= 90m, c was=?
But wen b was=100m, c was=90
90*90/100 =81 (cross multiply)
So when A was 100m , b was 90m, c was 81m
Therfore. Distance between a and c is 100-81=19m

Answer 2

Hi there!
Here's the answer:


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While A runs 100 m,
B runs 100 - 10 = 90 m

While B runs 100 m,
C runs 100 - 10 = 90 m

=> While B runs 90 m,
C run 90/100×90 = 81 mts

i. e., while A run 100 m,
B run 90 m and C run 81 m

Hence A beat C by (100-81) = 19 mts

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Hope it helps