**Course: CA Foundation; Topic: Ratio**

**Learning Objective:**

**How to solve word problem relating to ratios and speed?**

**Concept:**

**A ratio is a comparison of the sizes of two or more quantities of the same kind by division.****Both the terms of a ratio can be multiplied or divided by the same non-zero number.****Usually a ratio is expressed in lowest terms.****The order of the terms in a ratio is important.****Ratio exists only between quantities of the same kind. Quantities to be compared must be in same units.****To compare two ratios, convert them into equivalent like fractions.**

**Exercise 1A, Question 25, CA Foundaton Study Material**

**Question: The ratio between the speeds of two trains is 7 : 8. If the second train runs 400 kms. in 5 hours, the speed of …?**

**𝐎𝐩𝐭𝐢𝐨𝐧 (𝐀) : 10 Km/hr****𝐎𝐩𝐭𝐢𝐨𝐧 (𝐁) : 50 Km/hr****𝐎𝐩𝐭𝐢𝐨𝐧 (𝐂) : 70 Km/hr****𝐎𝐩𝐭𝐢𝐨𝐧 (𝐃) : None of these**