Question

The diameter of a spherical balloon is 21cm. How much leather is required to prepare 5 such balls

Solution -diameter of a ball =21cm
Radius =21/2=10.5
C. S. A.of a ball =4pi r square
4*22/7*10.5*10.5
88*1.5*10.5
=1386m Sq
Leather is required to prepare 5 such balls
=1386*5
=6930cm sq

Answer 1

answer to aapne question me hi likh diya