Question

20 boys on rupees 1680 in 7 days how much will 15 boys earn in 5 days.​

Answer 1

Step-by-step explanation:

Case1:

No.of boys=n1=20

money(M1= 1680

DAYS D1= 7

CASE2:

NO.OF boys = n2= 15

money = m2=?

days 5

n1 m1 d1= n2 m2 d2

20×1680×7=15×m2×5

so 3136rupees is ur answer

hope u understand

have a nice day

Answer 2

Answer:

• 15 boys will earn 1260 rupees in 7 days.

To find:

• How much 15 boys will earn in 5 days?

Given:

• 20 boys will earn 1680 rupees in 7 days.

Solution:

20 boys earn in 7 days = Rs. 1680

15 boys earn in 5 days = x

Given that,

• 20 boys earn in 7 days = Rs. 1680

➥ 1 boy earn in 1 day = $\bf \dfrac{1680}{20 \times 7}$

➥ 15 boys earn in 1 day = $\bf \dfrac{1680}{20 \times 7} \times 15$

Now,

➥ 15 boys in 7 days :

$\rightarrow \bf \dfrac{1680}{ \not{{20 }}\times 7} \times \not{ 15} \times 7$

$\rightarrow \bf \dfrac{1680}{4 \times 7} \times 3 \times 7$

$\rightarrow \bf \dfrac{21 \times 1680}{4 \times 7}$

$\rightarrow \bf \dfrac{ \not{21} \times 1680}{ \not{4} \times 7}$

$\rightarrow \bf \dfrac{ 5.25 \times 1680}{1 \times 7}$

$\rightarrow \bf \dfrac{ 5.25 \times \not{1680}}{1 \times \not{ 7}}$

$\rightarrow \bf \dfrac{ 5.25 \times 240}{1 \times 1}$

$\rightarrow\bf { 5.25\times 240}$

$\rightarrow \bf 1260$

Hence, 15 boys in 7 days can earn 1260 rupees.