Circumference of larger circle = 2πr 132 = 2 × 22/7 × r r = (132 × 7)/(22 × 2) = 21 cm. Area of a larger circle = πr² = 22/7 × 21 × 21 = 1386 cm. Circumference of smaller circle = 2πr 88 = 2 × 22/7 × r r = (88 × 7)/(22 ×2) = 14 cm. Area of a smaller circle = πr² = 22/7 × 14 × 14 = 616 cm. ∴ Required difference = 1386 – 616 = 770 cm.
Which of the following is not an algae?
What is the term for the rhythmic contraction of the muscle lining of the canal to push food along the gut?
A man cannot see clearly beyond 10 meters. The disease he suffers from :
What is the primary nitrogenous waste product excreted by humans?
In roots, the protoxylem lies towards the periphery and the metaxylem towards the center. This arrangement of primary xylem is called ____________.
The hormone, also called the ligand is considered as_________.
Which of the following is a kingdom of organisms?
I. Monera
II. Protista
The wilting of plants occurs due to:
Which of the following is not an example of asexual reproduction?
Which of the following statement is correct about cells?
I. Cell membrane is absent in plant cell
II. Cell wall is present in animal cell
