Question

Q3.Mother wants to divide ₹56 among her daughters Parul
and Priyam in the ratio of their ages. If Parul is 9 years
old and Priyam is 15 years old, find the amount each
one of these get.​

Answer 1

Answer:

Correct option is

A

1

Let Δ=

∣

∣

∣

∣

∣

∣

∣

∣

l

1

l

2

l

3

m

1

m

2

m

3

n

1

n

2

n

3

∣

∣

∣

∣

∣

∣

∣

∣

Δ

2

=

∣

∣

∣

∣

∣

∣

∣

∣

l

1

l

2

l

3

m

1

m

2

m

3

n

1

n

2

n

3

∣

∣

∣

∣

∣

∣

∣

∣

×

∣

∣

∣

∣

∣

∣

∣

∣

l

1

l

2

l

3

m

1

m

2

m

3

n

1

n

2

n

3

∣

∣

∣

∣

∣

∣

∣

∣

Multiplying row by row

=

∣

∣

∣

∣

∣

∣

∣

∣

l

1

2

+m

1

2

+n

1

2

l

1

l

2

+m

1

m

2

+n

1

n

2

l

1

l

3

+m

1

m

3

+n

1

n

3

l

1

l

2

+m

1

m

2

+n

1

n

2

l

1

2

+m

2

2

+n

2

2

l

2

l

3

+m

2

m

3

+n

2

n

3

l

1

l

3

+m

1

m

3

+n

1

n

3

l

2

l

3

+m

2

m

3

+n

2

n

3

l

3

2

+m

3

2

+n

3

2

∣

∣

∣

∣

∣

∣

∣

∣

=

∣

∣

∣

∣

∣

∣

∣

∣

1

0

0

0

1

0

0

0

1

∣

∣

∣

∣

∣

∣

∣

∣

using given conditions.

⇒Δ

2

=1

∴Δ=±1

∴k=1

Answer 2

Answer

Parul's age=9 years

priyam's age= 15 years old

Ratio=parul's age

________________

priyam's age

9÷3

_________

15÷3

= 3 & 5

Therefore,the answer is 3:5

hope it helps...