1. दो संख्याएं 7:5 के अनुपात में हैं उनका गुणनफल 560 है। छोटी संख्या ज्ञात कीजिए।
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let first number is X and second is Y.
a/q X/Y=7/5
X=7Y/5--------(1)
A/Q. (X)(Y)= 560-----(2)
out the value of X in equation (2)
7Y/5(Y)= 560
7Y²= 560×5
7Y²=2800
Y²= 400
Y=√400
Y=20
put the value of Y in equation (1)
X=7×20/5
X=7×4
X=28
therefore
first number=X=28
& second number=Y=20
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