Question

ଏକ ବର୍ଗକ୍ଷେତ୍ରର କ୍ଷେତ୍ରଫଳ 100 ବର୍ଗ ସେ.ମି । ଏହାର ବାହୁର ଦୈର୍ଘ୍ୟ 25% କମାଇଦେଲେ, କ୍ଷେତ୍ରଫଳ କେତେ ହେବ ? ​

Answer 1

ନମସ୍କାର ପ୍ରିୟ ବନ୍ଧୁ |

ଗୋଟିଏ ବର୍ଗକ୍ଷେତ୍ରର କ୍ଷେତ୍ରଫଳ ( Area of a Square ) = 100 ବର୍ଗ ସେ.ମି.

ତୋ, ଆମକୁ ଆଗେ ଏହି ସବୁ ପଦାଙ୍କ କରିବାକୁ ପଡିବ |

• if a side of square is reduced to 25%, that means it directly affects the side of a square also.
• So, in other words, if we reduce the area of a given square which is 100 cm² to it's 25%.
• 100 – ( 100 × 25/100 )
• 100 – ( 100 × 1/4 )
• 100 – 25 = 75 cm². ( Ans )

Let's Verify it, whether we got the 75 cm² or not.

• So, we got the area of a square which is 75 cm² ( after reducing it's side of 25% of the original area of a square of 100 cm² ).
• We know that side of a square is = Side × Side. Let, the side of a square be a cm.
• So, a² = 75
• a = √75 = 8.66 cm.

Now, we got the side of a reduced square, a = 8.66 cm. We now have to find the area of a square by taking the side as a = 8.66 cm.

• Area of a square = a² = (8.66)² = 74.99
• That's exactly = 75 cm².

ଏହି ପ୍ରଶ୍ନର ଉତ୍ତର ହେଉଛି = 75 ବର୍ଗ ସେ.ମି । ( Ans ).