if a,b,c are in proportion . find a if b=15 and c =40
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Answer:look at the pic.... answer: 5.625.
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If a,b,and c are in proportion .....
product of mean =product of extreme
a : b = b : c
b = 15 and c = 40 , a = ?
here,product of extreme is a×c
product of mean is b×b
40×a=15×15
40a=225
a=225/40
a=45/8
a=5.625
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