BOOST YOUR APTITUDE WITH TRICKS! PART-2

kokilas203
May 12, 2021
2 min read

Hey Learners ,in the Part 1 we have seen the first 4 types of problems in the chapter RATIO & PROPORTION, Now let us see the remaining 4 types of problems and their solving strategies!

Optimistic Learners is here to enhance your aptitude skills with some tips and tricks.

Here we go with the chapter : RATIO & PROPORTIONS

Types of problem : PART -2

Finding A: D from A: B, B: C and C: D.
Usage of Common Factor x.
Finding number of Coins in a bag.
Adding and removing quantities.

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Want to learn the first 4 types of problems in this chapter then click here to learn the part-01

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Finding A: D from A: B, B: C and C: D

FORMULA:

Question:

Ratio between salary of A and B is 3: 5, B and C is 4: 5, C and D is 6: 7. If the salary of A is $ 7200, find the salary of D.

A: D = 72: 175

7200/D = 72/175

D = 17500

FORMULA SUBSTITUTION METHOD:

Usage of Common Factor x

Question:

Two numbers are in the ratio 4: 5. Sum of their squares is 1025. Find the numbers.

Answer:

Substitute the common factor x to the ratio 4: 5 Assume the actual numbers as 4x and 5x Given,

(4x) 2 + (5x) 2 = 1025

16x2 + 25x2 = 1025;

41x2 = 1025 x2 = 25;

x = 5

Substitute x = 5 in 4x and 5x to find the numbers

The numbers are, 20 and 25.

Finding number of Coins in a bag.

Question:

A bag contains 5 paise, 10 paise and 20 paise coins in the ratio 2:4:5. Total amount in the bag is Rs. 4.50. How many coins are there in 20 paise?

Answer:

T = (2 x 5) + (4 x 10) + (5 x 20)

= 150 paise

= Rs. 1.50

X = 4.50/1.50 X = 3

Quantity of 20 paise coins

= 5 x 3

= 15 coins.

FORMULA:

Adding and removing quantities.

Question:

Container 1 has milk and water in the ratio 2 : 5. After adding 4 liters of pure water from container 2, the ratio between milk and water in container 1 became 1 : 3. Find the quantity of milk in the container.