Solution: Circumference of first circle = 2 πr = 2π x 19 = 38π cm Circumference of second circle = 18π cm Or, 2πr = 56π Or, 2r = 56 Or, r = 28 cm Circumference of...
1 Answers 1 viewsAnswer:Area of first circle = πr2 = π82 = 64π sq cm Area of second circle = π62 = 36π sq cm As per question; area of the largest circle = 64π + 36π = 100π...
1 Answers 1 viewsLet radius of the circle =r if perimeter = area 2πr=πr² 2r =r²----(1) if r=2 2*2 =2² 4=4 So, correct option is (A) r = 2 units
1 Answers 1 viewsplease complete the question
1 Answers 1 viewsAccording to the equation of motion under gravity v2 − u2 = 2gs Where, u = Initial velocity of the stone = 0 m/s v = Final velocity of the stone s = Height...
1 Answers 1 views(i) True (ii) False (iii) False (iv) True (v) False (vi) True
1 Answers 1 viewsHere, h = 5 cm, 2πrh = 94.2 cm2. (i) 2πrh = 94.2 ⇒ 2 × 3.14 × r × 5 = 94.2 ⇒ r = 94. 2/ 2x 3.14x 5 = 3 Hence, base...
1 Answers 1 viewsBy observing the virtual images formed by the three mirrors, we can distinguish between the mirrors as: (i) Plane mirror will produce an image of the same size, (ii) Concave mirror will...
1 Answers 2 views(b) 14.1 cm2 Explanation: Area of a circle, A = πr2 On putting the values, we get: A=22/7×2.12×2.12 ⇒A=14.1 cm2 The rules to determine the number of significant digits says that in the multiplication of two...
1 Answers 1 views(b) 14.1 cm2 Explanation: Area of a circle, A = πr2 On putting the values, we get: A=22/7×2.12×2.12 ⇒A=14.1 cm2 The rules to determine the number of significant digits says that in the multiplication of two...
1 Answers 1 views