दिए गए व्यंजक का मान ज्ञात कीजिए: 68 × 52 + 73 × 67 - 35 × 25 = ?

Find the area of a square if the length of each side of the square is 3 cm more than the width of a rectangle. The perimeter of the rectangle (whose length is 16 cm) is 37.5% more than the perimeter of an equilateral triangle whose area is 64√3 cm2.

A landscaper is designing a square park with a side of 45 m. He decides to remove a square section of side 25 m for a parking lot and later adds a square section of side 15 m for a playground. What is the net area of the park (in sq m)?