Purchase Solution

the radius of the ring

Not what you're looking for?

Ask Custom Question

An archer is to fire arrows at a target of concentric circles. The target - maker wishes to calculate the cross - sectional areas of the rings A, B, C and D of the target to make their areas in the ration of 4:3:2:1. The whole target is of radius 10 cm.

(i) Calculate the fraction of the total area of the target filled by each of the regions A, B, C, D

(ii) Find an expression for the area of the target, leaving your answer as a multiple of =/

(iii) Find an expression for each area A, B, C, D leaving your answer as a multiple of =/

(iv) Show that the inner radius of ring A is squared root 60cm, and find similar expressions for the inner radii of ring B and ring C. (Leave your answers as square roots).

Please show your work.

Purchase this Solution
Solution Summary

This posting finds the radius of the ring.

Purchase this Solution
Free BrainMass Quizzes
Geometry - Real Life Application Problems

Understanding of how geometry applies to in real-world contexts

Solving quadratic inequalities

This quiz test you on how well you are familiar with solving quadratic inequalities.

Know Your Linear Equations

Each question is a choice-summary multiple choice question that will present you with a linear equation and then make 4 statements about that equation. You must determine which of the 4 statements are true (if any) in regards to the equation.

Multiplying Complex Numbers

This is a short quiz to check your understanding of multiplication of complex numbers in rectangular form.

Probability Quiz

Some questions on probability

View More Free Quizzes
Related BrainMass Solutions

  • Area Between Two Concentric Circles

    Then outer radius of the ring = r + t Inner radius of the ring = r Area of the ring = Area of the out circle - Area of the inner circle = (r + t)2 - r2 = (r + t)2 - r2] = (r2 + t2 + 2rt - r2] = t2 + 2rt) But given that area of the

  • Magnetic field

    Let us consider an annular ring of inner radius r and outer radius r+dr with its center coinciding with the center of the disc.

  • Newton's ring

    In a Newton's ring experiment, the diameter of the nth bright ring is given by the formula, Dn = 2 * sqrt[ ( n + 1/2) * lambda * R/ mu] where n is the number of the fringe, lambda is the wavelength of light used, R is the radius of curvature of

  • Equilibrium: Contact Force and Tension in the Ring.

    147721 Equilibrium: Contact force and tension in the ring. Three identical steel balls, each of mass m, are placed in a cylindrical ring which rests on a horizontal surface and whose height is slightly greater than the radius of the balls.

  • Volume of Ring-Shaped Solid and Volume Expressed in Terms of Height

    33016 Volume of Ring-Shaped Solid and Volume Expressed in Terms of Height A) A cylindrical drill with radius r1 is used to bore a hole through the center of a sphere of radius r2. Find the volume of the ring-shaped solid that remains.

  • The Energy of Spin-Orbit Coupling

    the ring): (1.16) Since the radius of the orbit is constant, we can write the field as: (1.17) Where is some constant.

  • Ratio of magnetic moment to angular momentum

    As the points A and B are rotated on the surface of the electron, they create a ring of charge of radius CA (r) and width AB; circumference of the ring being 2Πr and width being AB.

  • Rotational dynamics: Rolling of ring and disc from incline

    58937 Rotational dynamics: Rolling of ring and disc from incline A solid disk and ring of the same mass and radius start from rest at the top of an incline. both of them start from the same vertical height of 0.5m and roll down an incline.

  • Moment of inertia

    41546 Moment of inertia Moment of inertia of a circular ring of mass M and radius a about a line through its centre perpendicular to its plane moment of inertia of a circular ring of mass M and radius a about a line through its centre perpendicular to

View More Related Solutions