Question

Two friends Tina and Meena had + 275 and 1 350 respectively. Tlna spent 20% of her
money while Meena spenr 22% of her money. Who out of the two spent more
​

Answer 1

Answer:

Let P be the principal invested by Meena and Tina

Given Meena invests CI and invested at SI at 16.66% Rate of interest for 2 years.

∴ Let A be the amount tina gets at the end of 2 years

then Meena gets A+23

A=P+

100

P+R

A+23=P(1+

100

R

)

T

P(1+

100

R

)

2

P(1+

3×100

50

)

2

=P(1+

3×100

2×50

)+23

P(1+

6

1

)

2

=P(1+

3

1

)+23

P(

6

7

)

2

=P(

3

4

)+23

36

49P

−

3

4P

=23

36

49P−48P

=23

P=23×36=828 ∴ The amount they invested is 828 each

Answer 2

$\huge{answer}$

20% of 275

$\frac{20}{100} \times 275 \\ \\ 0.2 \times 275 \\ \\ 55$

22% of 1350

$\frac{22}{100} \times 1350 \\ \\ 0.22 \times 1350 \\ \\ 297$

Meena spend more than Tina.