Please answer this please maths legends quickly
Attachments:
Answers
Answered by
5
Surface area of a sphere = 4πr²
Given that diameter = 21cm
=> radius = 21/2 = 10.5 cm
=> surface area = 4 × 22/7 × (10.5)²
=> surface area = 4 × 22/7 × 110.25
=> surface area = 4 × 22 × 15.75
=> surface area = 1386 cm²
So leather required for 1 ball = 1386cm²
=> leather required for 5 balls = 1386 × 5
=> leather required for 5 balls = 6930 cm²
Your answer = 6930 cm²
Given that diameter = 21cm
=> radius = 21/2 = 10.5 cm
=> surface area = 4 × 22/7 × (10.5)²
=> surface area = 4 × 22/7 × 110.25
=> surface area = 4 × 22 × 15.75
=> surface area = 1386 cm²
So leather required for 1 ball = 1386cm²
=> leather required for 5 balls = 1386 × 5
=> leather required for 5 balls = 6930 cm²
Your answer = 6930 cm²
MonsieurBrainly:
This is not a place to post and get your questions solved
Ok
msg me
Answered by
5
Surface area of a sphere = 4πr².
Diameter=21 cm.
Radius = diameter/2
= 21/2
= 10.5 cm = 105/10 cm.
Surface area = 4 * 22/7 * (105/10)²
= 88/7 * 11025/100
= 1386 cm².
Leather required for 1 ball is 1386 cm.
Leather required for 5 such balls = 5*1386 = 6930 cm = 69.3 m
Similar questions