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Find the fourth proportional of 4a + 7,11a + 3 and 6a, if a = 2.

A25

B15

C30

D20

Answer:

D. 20

Read Explanation:

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ഒരു ക്ലാസിൽ ആൺകുട്ടികളും പെൺകുട്ടികളും തമ്മിലുള്ള അംശ ബന്ധം 5 : 4 ആണ്. ആ ക്ലാസിൽ 20 പെൺകുട്ടികൾ ഉണ്ടെങ്കിൽ ആൺകുട്ടികളുടെ എണ്ണമെത്ര ?