18. the volume of cylinder is 550 cm3
. if the radius of cylinder is 5 cm then height is …… cm.
(a) 14 (b)7 (c)9 (d) 12
19. if 5 cos a =4 sin a ,then tan a = ……
(a)
(b) 5 (c)
(d)
20. for any information m + ⃛ =22 and m - ⃛ =2 MC
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Answer:
18.(b) 7cm
volume of cylinder = 550cm^3
πr^2h = 550
22/7 ×5×5×h = 550
h = 550 × 7 / 22 × 5×5
h = 7cm
19. 5cos a = 4 sin a
tan a = sin a / cos a
tan a = 4/5
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