Pls solve the questions 11 ,12,13,14,and 15 from the given
Answers
Answer:
Please Mark me Brainliest as I solved all.
Step-by-step explanation:
Q 11. Let the population of women be x.
Total population = 210,000
If Population of men is 4/7, then Population of women = 1-4/7
= 3/7
According to question,
X = 3/7 of 210,000
X = 3 * 30,000
X = 90,000
Population of women= 90,000
Q 12. a : b = 2 : 5
b : c = 3 : 8
since b is in two ratios, make the value of b same in both ratios.
To make the value of b same, find it's LCM of both values. LCM if 3 and 5 is 15
To make b as 15 in first ratio multiply it by 3.
a : b = 3(2 : 5)
= 6 : 15
To make b as 15 in the second ratio multiply it by 5.
b : c = 5(3 : 8)
= 15 : 40
a : b :: b : c = 6 : 15 :: 15 : 40
thus, a : b : c = 6 : 15 : 40
Q 13. Let the ratio be X.
ratio = 2x : 5x
Given,
2x - 5x = 27
- 3x = 27
X = - 9
Numbers are 2x = -18, 5x = -45
Q 14. Let the new salary be x.
According to question,
5 / 6 = 20,000 / X
X = 20,000 * 6/5
X = 24,000
New salary= 24000
Q 15. Let the ratio be X.
Ratio = 5x : 6x
Total length of rope = 22 cm.
First part = 5x
Second Part = 6x
According to question,
5x + 6x = 22
11x = 22
X = 2
Length of first part = 5x = 10cm
Length of Second part = 6x = 12 cm