Question

B) Solve the following questions.

i) Radius of circle is 4 cm. Find the length of longest chord of the circle.

ii) Radius of sphere is 4 cm. Find its surface area. (1 = 3.14)

iii) Find the value of : 5 sin 30° + 3 tan 45º

iv) In which quadrant does the point lie whose both co-ordinates are negative ?​

Answer 1

Answer:

1 ans

Step-by-step explanation:

length of the longest chord of the circle will be twice of its radius i.e 8cm. From this we can conclude that , Diameter = longest chord of the circle

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Answer 2

Answer:

i) The length of the longest chord of the circle = 8cm

ii) is in the explanation.

iii)

Step-by-step explanation:

ii) Given that,

Radius of sphere=r=4cm

Surface area of sphere=4πr

2

=4×

7

22

i

×4×4

=

7

1408

=201.14

Hence,

We get surface area of sphere is 201.14