### Math 10 Chapter 3 - Part B 1. If a/b = b/c = K then a = ___________ a) ck2 b) ck1 c) ck3 d) ck4 2. If a/ b = c/d then a + b/b = c + d/d is called the ____________ property. a) Commutative b) Closure c) Divdendo d) Componendo 3. The third proportional of 2 and 4 is _________. a) 6 b) 7 c) 8 d) 5 4. If 4:x::x:49 then x = ____________. a) 13 b) 14 c) 12 d) 15 5. In proportion a:b::c:d, b and c are called extremes. a) False b) True 6. If x a y3 then x3 = ky a) True b) False 7. If x:12 = 4:3 then x = 16 a) True b) False 8. If a/b = 7/13 then b + a /b - a = 10 /3 a) False b) True 9. The ratio among the angles of triangle are 3:7:8 then the angles are 30o 70o and 80o. a) True b) False 10. The ration among the sides of a triangle are 3,4,5 its perimeter s 120m. Then the length of the smallest side is 40m a) False b) True 11. If a:b = c:d then a | b : c | d = a + b : c + d . a) True b) False 12. If 3a | 5b/3a + 5b = 3c | 5d/3c + 5d then a:c = b:d a) True b) False 13. If a:b:c:d then a:d = b:c a) True b) False 14. The mean proportional in b7 and b9 is b16 a) True b) False 15. The value of x in continued proportion of 3, x+2, 27 is 7. a) False b) True 16. If a:b::b:c then c is called the fourth proportional. a) False b) True 17. The fourth proportional of a2 | b2, b and a | b is a (a + b). a) False b) True 18. There is direct proportion between volume and pressure of an object. a) True b) False 19. Weight and mass of a body are directly proportional. a) True b) False 20. If y a x then y = kx a) True b) False

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