Question

plz give answer with full explainatio ..... ​

Answer 1

Simple question

volume of alcohol in 15litres solution:-20/100 ×15=3

volume of alcohol in 12 litres solution:-24/100 ×12=72/25

resultant solution=15+12=27litres

alchol in it =(72+75)/25=147/25

concentration =(147×100)/(25×27)

=(147×4)/27 =>(49×4)/9=196/9

$21 \ \frac{7}{9} \%$=196/9

so option1) is correct

Answer 2

Answer:

first answer is = 3

second answer is =72/25

third answer is =27liters

fourth answer is =147/25

fifth answer is =196/25

so option (A)is correct