If you see The abc triangle you can see that triangle DEF is about twice the size of the other triangle so if you would double the size of the small triangle by the same number which was 20 you would do 20 + 20 = 40 and you would multiply 4 x 5 which equals 20 and add 20 + 20 which equals 40 which is the double amount of triangle ABC
The percentage of lemon in the juice is 10% The percentage of water sugar is (100-10)=90% The quantity of lemon in 20 liters of sugar water will be: amount=(percentage of lemon)/(percentage of sugar water)×(amount of sugar water) =10/90×20 =2 2/9 liters
