Q1 of 59 Page 77

Select the appropriate alternative answer for the following questions.
If 6 : 5 = y : 20 then what will be the value of y?

Given: 6:5 = y:20

⇒ 6/5 = y/20

Cross multiply and get:

5y = 6 × 20

⇒ y = 6 × 4 = 24

∴ Option B is correct.

If and a, b, c >0, then show that,

i. (a + b+ c)(b – c) = ab – c²

ii. (a² + b²)(b² + c²) = (ab + bc)²

iii. (a² + b²)/ab = (a + c)b

Find mean proportional of

Select the appropriate alternative answer for the following questions.

What is the ratio of 1 mm to 1 cm?

Select the appropriate alternative answer for the following questions.

The ages of Jatin, Nitin and Mohasin are 16, 24 and 36 years respectively. What is the ratio of Nitin’s age to Mohasin’s age?

Questions · 59

4. Ratio and Proportion

1 2 3 4 5 6 7 8 1 2 3 4 4 4 4 4 5 6 7 1 2 3 4 4 4 4 4 4 1 2 3 3 3 3 3 4 1 2 3 4 5 6 1 1 1 1 1 2 3 4 5 6 7 8 9 10 11 12 13

Select the appropriate alternative answer for the following questions.If 6 : 5 = y : 20 then what will be the value of y?