Area
Only available for you
141 The circumference of a circle is equal to the perimeter of a rectangle. The length and the breadth of the rectangle are 45 cm and 43 cm, respectively. What is the half the radius of the circle?
142 A person observed that he required 30 s time to cross a circular ground along it's diameter than to cover it once along the boundary. If his speed was 30m/min, then the radius of the circular ground is (take 7i = 2$$\frac{2}{7}$$)
143 Two circles with radius 2R and √2R intersect each other at points A and B. The centers of both the circles are on the same side of AB. O is the center of the bigger circle and ∠AOB is 60°. Find the area of the common region between two circles:
144 Points P, Q, R and S are taken on sides AB, BC, CD and DA of square ABCD respectively, so thatAP : PB = BQ : QC = CR : RD = DS : SA = 1 : n . Then the ratio of the area of PQRS to the area of ABCD is:
144 The area of a rectangle is 4 times of the area of a square. The length of the rectangle is 90 cm and the breadth of the rectangle is $$\frac{2}{3}$$ rd of the side of the square. What is the side of the square?
145 The length and the breadth of a rectangular plot are in the ratio of 5 : 3. The owner spends ? 3000 for surrounding it from all the sides at the rate of ₹ 7.5 per metre. What is the difference between the length and breadth of the plot?
146 A circle of radius 10 cm has an equilateral triangle inscribed in it. The length of the perpendicular drawn from the centre to any side of the triangle is
147 The area of circle inscribed in an equilateral triangle is 154 sq cm. What is the perimeter of the triangle?
148 What is the area between a square of side 10 cm and two inverted semicircular, cross-sections each of radius 5 cm inscribed in the square?
149 The base of a parallelogram is thrice of it's height. If the area of the parallelogram is 2187 sq cm, find it's height:
150 In a trapezium, the two non-parallel sides are equal in length, each being of 5 unit's. The parallel sides are at a distance of 3 unit's apart. If the smaller side of the parallel sides is of length 2 unit's, then the sum of the diagonals of the trapezium is