Math, asked by rahim9ifra, 11 months ago

Pls solve the questions 11 ,12,13,14,and 15 from the given

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Answered by manas3379
1

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

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