### Math 10 Chapter 3 - Part C 1. The graph of direct proportion between x and y is a straight line which passes through origin. a) False b) True 2. If 6:2x::4:2x-4 then x = 5 a) False b) True 3. The length and width of a rectangles are 65m and 39m respectively. The ration between the length and width is 5:3. a) True b) False 4. A ratio has no unit a) False b) True 5. The value of a ratio changes if its numerator and denominator and both multiplied and divided by the same number. a) False b) True 6. The order of elements in a ratio is not important i.e. a:b and b:a in the same. a) False b) True 7. If b2 = ac, then a, b and c are in continued proportion. a) True b) False 8. If a:b = c:d then b:a = d:c a) False b) True 9. The length and width of a rectangle is 120cm and 80cm respectively. The ratio between length and width is a) 3:2 b) 2:3 c) 6:4 d) 12:8 10. A ratio has units in a) kg b) cm c) m d) No unit 11. If 5:3x::2:2x-4 then x = a) 5 b) 8/11 c) 1/5 d) |8/11 12. Volume and temperature of an object are a) Both direct and inverse proportion b) No relation c) Inversely proportional d) Directly proportional 13. If v a 1/p, then a) v= kp b) kp = v c) vk = p d) vp= k 14. If 3:5::5:x then a) 15 b) 3 c) 25/3 d) 25 15. If a/b = c/d then the components property is a) b/a = dc b) a/a+b=c/c+d c) a-b/b = c-d/d d) a/c=b/d 16. The third proportional of x2 and y is a) y2/x2 b) x/y c) xy d) x2/y2 17. Circumference of a circle varies directly as its radius if radius of a circle is 3m then circumference is a) 6pm b) 9pm2 c) 6pm2 d) 9pm 18. y a x , when y = 4, x = 2, if x = 10 then y= a) 8 b) 10 c) 20 d) 5 19. The graphic representation between two quantities is a straight line passing through origin the relation between two quantities is a) Both a & b b) Inverse c) No relation d) Direct 20. z a 1/y when z = 2, y = 3, what will be z , when y = 2 a) 3 b) 6 c) 2 d) 4

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