Question
Perimeter of a square is equal to the perimeter of a
rectangle. The area of the square is 900 cm 2 and the length of the rectangle is four times its breadth. Find the area of the rectangle.Solution
Area of square = 900 cm2 Side of square = √900 = 30 cm Perimeter of square = 4 × 30 = 120 cm Perimeter of rectangle = 120 cm Let breadth = b, then length = 4b 2(L + B) = 120 2(4b + b) = 120 2 × 5b = 120 10b = 120 b = 12 cm L = 4b = 4 × 12 = 48 cm Area of rectangle = L × B = 48 × 12 = 576 cm2 Answer: 576 cm2
What is the value of ‘x’ if x% of 720 added to {2160 ÷ x of 20} × 2 gives 180?
{640 of 8 - (12)2 of 6} - 900 = ?
9/5 × 18/25 ÷ 42/21 = ? - 82/75
What value should come in the place of (?) in the following questions?
(? ÷ √1444) * 15 = 30 * 45 ÷ 19
345 × 20 ÷ 4 + 28 + 60 = ?Â
√3600% of 150 + 3/5 of 360 - ? = 210
Simplify the following expressions and choose the correct option.
(72 ÷ 3) × (5/6) + 7² = ?
414 ÷ 23 × 38 – 154 + 264 = ?
...17.5% of 400 – 24% of 150 = ?
3.3 Times 2/27 of 40% of 364=?
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