Question

12. A number is divided in the ratio 9:11. If the first part is 72, find the number.
​

Answer 1

Step-by-step explanation:

Given ratio = 9 : 11

First part = 72

Let the other part be x

According to Question ,

=> $\dfrac{9}{11}=\dfrac{72}{x}$

=>$x=\dfrac{11\times \cancel{72}}{\cancel9}$

$\red{\bf \leadsto x = 88 }$

Answer 2

Answer:

Let the common ratio be x.

Let the 1st no. be 9x.

Let the 2nd no. be 11x

Given that 1st part is 72.

:. 9x= 72

=> x= 8.

2nd part = 11x

= 11 × 8

= 88.

:. Thr no. is 72+88= 160.