*If ***a : b = 5 : 9 and b : c = 4: 7, find a : b : c.**

30/7

31/7

32/7

34/7

C. 32/7

$X/Y=3/4\iff (4x+5y)/(5x+2y)\phantom{\rule{0ex}{0ex}}=\left(4\right(x/y)+5)/(5(x/y)-2)\phantom{\rule{0ex}{0ex}}=\left(4\right(3/4)+5)/\left(5\right(3/4)-2)\phantom{\rule{0ex}{0ex}}=(3+5)/(7/4)=32/7$

11 ltr

12ltr

10ltr

15ltr

252,420

254.487

273,456

287,420

*If ***a : b = 5 : 9 and b : c = 4: 7, find a : b : c.**

30/7

31/7

32/7

34/7

a=500.b=390,c=240

a=490.b=392,c=280

a=498.b=396,c=287

a=491.b=372,c=286

*A bag contains ***50 p, 25 P and 10 p coins in the ratio 5: 9: 4, amounting to Rs. 206. Find the **

50p coins=200,25p coins=360,10p coins=160

50p coins=200,25p coins=400,10p coins=120

50p coins=240,25p coins=360,10p coins=120

50p coins=205,25p coins=365,10p coins=150