1- 75: x :: 5: 8 find x
2-. If A:B=6:7, B:C=8:9. Then find A:C.
3- The ratio between two numbers 3: 5 . If each number is increased by 4 , the ratio becomes 2:3. Find the numbers.
4-. Divide rupee 72 in the ratio 4:5.
5-. The ratio between two numbers 3:7 . If their LCM is 210. Find the numbers.
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2. A:B=6:7,B:c=8:9
then A/B x B/C = A/C
=6/7 X 8/9=16/21
therefore A/C=16/21
the answer is 16:21
5. Let the 2 numbers be 3x and 7x and HCF be x.
Using formula, a×b = LCM × HCF
3x × 7x = 210 × x
21x² = 210x
x = 210/21
x = 10
a = 3x = 3×10 = 30
b = 7x = 4×10 = 40
HCF = x = 10
Hope this helps :)
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120
Step-by-step explanation:
1-75:x::5:8
by the property of mean- product of extreams = product of means
here exteams are 75 and 8
here means are x and 5
75×8=600
x×5=some thing
here exteams=means
so,
75×8=x×5
600=x×5
x=600÷5
=120
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