Question about herd of cows 'knocks out' contestant of Road to Olympia

The Road to Olympia program often asks difficult questions. Whoever finds the right answer will surely have a very high IQ.

The riddle in the program Road to Olympia is as follows: "A square lawn is surrounded by a fence, with an area of ​​100 square meters. In one corner of the lawn is a tree stump and a cow standing. A 5 meter long rope is tied to the tree stump. What is the area of ​​the grass that the cow can eat, knowing that the area of ​​the tree stump is negligible?".

Candidate Duc Manh calculated the result as 25m2 but it was incorrect. Then, another candidate pressed the bell to answer with the answer 78.54m2, but it was still incorrect.

This Olympia quiz knocked out all the contestants.

Try your hand at this simple question from the show Road to Olympia. If you find the answer to the question, scroll down to the comments to record it and see how many people think the same as you.

Lam Hoang

Source: https://vtcnews.vn/cau-hoi-ve-dan-bo-danh-guc-thi-sinh-duong-len-dinh-olympia-ar925463.html