Question

Find the square of the following numbers without doing any calculation : (1) 15 (2) 25 (3) 35 (4) 45 (5) 55 (6) 65 (7) 75 (8) 85 (9) 95 (10) 305 Write a Pythagorean triplet whose one member is :​

Answer 1

Answer:

Find the square of the following numbers without doing any calculation : (1) 15 (2) 25 (3) 35 (4) 45 (5) 55 (6) 65 (7) 75 (8) 85 (9) 95 (10) 305Circumference of a circle is given by =2π×radius=2πr

If r=1, then circumference =2π units

So, area =πr

2

=π(1)

2

=π Units

New radius after increasing circumference:

2πr=4π

⇒r=2

New area =πr

2

=π(2)

2

=4π=4×older area

Hence, area becomes four times after increasing the circumference from 2π to 4π

Answer 2

Please see above picture your answer is there

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