Others Maths Puzzle

Given 2 circles of radius R1 & R2. how many rotations will the smaller circle(radius R2) have to make for a full
revolution around the circle with radius R1?

Read Solution (Total 3)

Here the smaller circle radius =R2
Its Circumerence=2*pie*R1
Radius of the bigger circle=R1
Circumference=R2
No. of rotations=2*pie*R1/2*pie*R2=R1/R/2
12 years agoHelpfull: Yes(5) No(2)

cicumference of circle with radius r1 = 2*pie*r1
cicumference of circle with radius r2 = 2*pie*r2
num of rotations be n =2*pie*r1=n(2*pie*r2)
n=r1/r2.
12 years agoHelpfull: Yes(3) No(0)
If R1 is radius of smaller circle and R2 is radius of bigger one then n*2*pi*R1 = 2*pi *R2 where n =revolutions = r2/r1
12 years agoHelpfull: Yes(2) No(1)

Others Other Question

A starts from a point P on a circular track ,at 6:00 am and runs around the track in clockwise direction .At 6:15 am ,B starts from the same point P and runs around the track in counter clockwise direction and meets A for the first time at 7:09 am.If B started at 6 am then he would have met A for the first time at 7 am.If both A & B start from P at 7:00 am and run in the opposite direction,then find the time at which they would meet at the starting point for the first time? PROVE THAT A (INTERSECTION)(B-C)= (A INTERSECTION B)-(A INTERSECTION C)

NOTE*= PROVE THIS WITHOUT TAKING ANY ARBITRARY ELEMENT..