RRB Government Jobs Exams Category

An equilateral triangle with each side = x cm is inscribed in a circle. Find the radius r of the circle in terms of x.

Read Solution (Total 2)

r radius and x side of triangle
r = x/sqrt(3)
9 years agoHelpfull: Yes(0) No(0)

cos30=(x/2)/radius
SQRT(3)/2 =x/2*radius
SQRT(3)=x/radius
radius=x/SQRT(3)
9 years agoHelpfull: Yes(0) No(0)

RRB Other Question

When Lee was thrice as old as Kevin,
His sister Kate was twenty-seven.
When Kevin was half as old as Kate,
Then brother Lee was thirty-eight.
Their ages add to one forty three.
How old are Kevin, Kate and Lee? On an insect collecting project Lizzy caught mudwasps, Izzy caught waterbugs and Dizzy caught flies. It was observed that three times the number of mudwasps that Lizzy caught less 14 was equal to the difference between the number of flies Dizzy caught and the number of waterbugs Izzy caught. In addition, it was observed that the sum of the mudwasps caught by Izzy and the waterbugs caught by Lizzy was 10 less than three times the flies caught by Dizzy. On further examination of the collection it was seen that three times the number of waterbugs caught by Izzy plus the difference between the number of mudwasps caught by Lizzy and the number of flies caught by Dizzy was 16. How many mudwasps did Lizzy collect?