Question

17. Pradeep a Export-import factory owner
wants to thank all his works by gifting two
types of decorated spherical ball. The
diameters of the spheres are (2a +5) cm
and (4 a +6) respectively.
no
42 cm
21 cm
D
11
1
Each ball is to be packed in a right circular
cylindrical boxes, which just encloses a
sphere as shown in figures.
(1) If the height of the cylinder I is 21 cm,
then value of a is
(a) 7 cm
(b) 8 cm
(c) 9 cm
(d) 10 cm
(ii) If the height of the cylinder II is 42 cm,
then value of a is
(a) 8 cm
(b) 7 cm
(c) 6 cm
(d) 9 cm
(iii) In the figure I, what is the curved
surface area of a sphere?
(a) 1286 cm? (b) 1386 cm2
(c)1486 cm? (d) 1586 cm?
(iv) Write the formula to find the volume of
cylinder
(a) trh
(b) πrl
(c) TƯ (1 + 1) (d) 2tr
(v) In the figure II, what is the curved
surface area of a sphere?
(a) 4545 cm? (b) 5544 cm
(c) 6655 cm? (d) 5566 cm​

Answer 1

Answer:

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Step-by-step explanation:

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