Question

The diameter of two circular plates are respectively 10 cm and 24 cm. What is the diameter of a plate which has area equal to the combined area of the two given plates?

Answer 1

Answer:

respectively. What is the diameter of the plate which has area equal to the combined area of the two given plates ?

Solution

respectively. What is the diameter of the plate which has area equal to the combined area of the two given plates ?

Solution

A

1

=

π

r

2

1

=

π

(

5

)

2

=

25

π

A

2

=

π

r

2

2

=

π

(

12

)

2

=

144

π

π

R

2

=

25

π

+

144

π

R

2

=

169

⇒

R

=

13

c

m

S

=

26

c

m

Answer 2

Answer:

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