The area of Delhi is 1,484 sq. km and the area of Mumbai is 550 sq. km. The population of Delhi is approximately 30 Class 8

The area of Delhi is 1,484 sq. km and the area of Mumbai is 550 sq. km. The population of Delhi is approximately 30 Class 8

Question 1.

The area of Delhi is 1,484 sq. km and the area of Mumbai is 550 sq. km. The population of Delhi is approximately 30 million and that of Mumbai is 20 million people. Which city is more crowded? Why do you say so? Class 8

Solution:

Population of Delhi

= [latex]\frac{30 \text { million }}{1484}[/latex] per sq. km

= Approx. 20 thousand per sq. km. Population of Mumbai

= [latex]\frac{20}{550}[/latex] million per sq. km

= Approx. 36 thousand per sq. km.

So, Mumbai is more crowded.

Question 2.

A crane of height 155 cm has its neck and the rest of its body in the ratio 4 : 6. For your height, if your neck and the rest of the body also had this ratio, how tall would your neck be? Class 8

Solution:

Do as directed. My neck may be

[latex]\frac{150}{(4+6)}[/latex] × 4 = 15 × 4 = 60 cm.