Question : If a wheel has a diameter of 42 cm, then how far does the wheel go (in metres) in 12 revolutions? (Take $\pi=\frac{22}{7}$)
Option 1: 21.45
Option 2: 23.27
Option 3: 15.84
Option 4: 17.64
Correct Answer: 15.84
Solution : Use : C = $\pi$ × d, where, C is the Circumference of the circle, d is the diameter According to the question C = $\pi$ × d = $\frac{22}{7}$ × 42 = 132 cm $\therefore$ Total distance = Distance per revolution × Number of revolutions = 132 cm × 12 revolutions = 1584 cm = 15.84 metres Hence, the correct answer is 15.84.
Application | Eligibility | Selection Process | Result | Cutoff | Admit Card | Preparation Tips
Question : A wheel has a diameter of 84 cm, then how far does the wheel go (in metres) in 16 revolutions? (Take $\pi=\frac{22}{7}$)
Option 1: 42.24
Option 2: 21.12
Option 3: 36.28
Option 4: 27.48
Question : In a circle of radius 42 cm, an arc subtends an angle of 60° at the centre. Find the length of the arc. $\left(\right.$ Take $\left.\pi=\frac{22}{7}\right)$
Option 1: 44 cm
Option 2: 21 cm
Option 3: 22 cm
Option 4: 42 cm
Question : The radius of a circle is 1.75 cm. What is the circumference of the circle? (Take $\pi=\frac{22}{7}$)
Option 1: 5.5 cm
Option 2: 11 cm
Option 3: 9.63 cm
Option 4: 22 cm
Question : A sector of a circle has a central angle of 45° and an arc length of 22 cm. Find the radius of the circle. ( Use $\pi=\frac{22}{7}$)
Option 1: 32 cm
Option 2: 35 cm
Option 3: 28 cm
Option 4: 36 cm
Question : The circumference of a circle exceeds its diameter by 60 cm. The area of the circle is: (Take $\pi=\frac{22}{7}$ )
Option 1: 1078 cm2
Option 2: 616 cm2
Option 3: 536 cm2
Option 4: 346.5 cm2
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile