Question

if the radius of a circle increases by 4 times the diameter is increased by how much time

Answer 1

Answer:

Step-by-step explanation:

Let d1 be the diameter and r is the radius of a circle.

d1 = 2.r………………………..(1)

If new radius is 3r. and diameter is d2 then:-

d2= 6r……………………………(2)

Dividing eqn. (2) by (1)

d2/d1= 6r/2r

d2/d1=3

or. d2= 3d1

Thus, the diameter of the circle is increased by 3 times

Answer 2

Step-by-step explanation:

let the radius be x ....then the diameter is 2x

d = 2x

Now, as per the question,

radius is increased by 4 times = 4x

then diameter = 2 × 4x = 8x

so, no. of times diameter will increase = 8x / 4x

= 2 times