arrow
arrow
arrow
Using π=227\pi = \frac{22}{7}π=722​​, find the circumference of a circle whose diameter is 38.5 cm .
Question

Using π=227\pi = \frac{22}{7}​, find the circumference of a circle whose diameter is 38.5 cm .

A.

165 cm

B.

121 cm

C.

154 cm

D.

170 cm

Correct option is B

Given:

Diameter of the circle, d = 38.5 cm

π = 227\frac{22}{7} ​​​

Formula Used:

The circumference of a circle is calculated using the formula:

C = πd

Solution:

C = 227×38.5=8477\frac{22}{7} \times 38.5 = \frac{847}{7} = 121 cm

Thus, the circumference is 121 cm.

Free Tests

Free
Must Attempt

CBT-1 Full Mock Test 1

languageIcon English
  • pdpQsnIcon100 Questions
  • pdpsheetsIcon100 Marks
  • timerIcon90 Mins
languageIcon English
Free
Must Attempt

RRB NTPC Graduate Level PYP (Held on 5 Jun 2025 S1)

languageIcon English
  • pdpQsnIcon100 Questions
  • pdpsheetsIcon100 Marks
  • timerIcon90 Mins
languageIcon English
Free
Must Attempt

RRB NTPC UG Level PYP (Held on 7 Aug 2025 S1)

languageIcon English
  • pdpQsnIcon100 Questions
  • pdpsheetsIcon100 Marks
  • timerIcon90 Mins
languageIcon English
test-prime-package

Access ‘RRB Group D’ Mock Tests with

  • 60000+ Mocks and Previous Year Papers
  • Unlimited Re-Attempts
  • Personalised Report Card
  • 500% Refund on Final Selection
  • Largest Community
students-icon
368k+ students have already unlocked exclusive benefits with Test Prime!
Our Plans
Monthsup-arrow