Question

1.How many litres of water must be added to 20 litres of 10% solution of salt and water to produce a 6% solution?

2.If one of the two complementary angles is 20° larger than 4 times the other, find the angles

3.In triangle PQR, right angled at Q and angle P is four times as large as angle R. Find angle P and angle R.

4.Ramu has 28 oranges more than Gholu who says: "Ramu, give me 30 of your oranges and I will
have twice as many as will be left with you. How many oranges does each has ?

5.the average of three numbers is 39.if the first number is twice the second and the second is four
times the third, find the numbers

6.A mother's age equals the sum of the ages of her five children. If after 12 years the sum of the ages
of the children will be twice the age of their mother, how old is the mother now?
(Hint: After 12 years, age of each child will increase by 12 years so total increase in age of 5 children
after 5 years will be 12x 5 = 60 years more)

plz answer fast all​

Answer 1

Answer:

$\frac{2} {3}$