Test: Comparing Quantities - Class 7 MCQ

First convert both the distance to the same unit 
So 3 km = 3×1000m
              = 3000 m
Thus the required ratio, 3 km : 300 m is 3000 : 300 = 10 : 1

Since 2 cm = 1000km
1 cm = 500km
2.5cm = 500*2.5
           =1250km

So option C is the correct answer

6 bowls cost Rs.90
so 1bowl cost 90/6=Rs.15
cost of 10 bowls=10×15=Rs.150

So option A is the correct answer. 

Distance covered with 25 litres of petrol = 150 Km

Distance covered with 30 Litres of petrol= 150/25 × 30 = 180 Km (Using Unitary Method)

So option C is the correct answer. 

Let total students be x
60/100* x = 18
x = 30
boys = 30−18 = 12
ratio of girls/ ratio of boys = 18 /12 = 3/2

So option C is the correct answer. 

Speed of cycle = 15km/hr
Speed of scooter = 30km/hr
Ratio = cycle/scooter
= 15/30
= 1/2

So option C is the correct answer. 
 

Ratio of 5m to 10km is

10km = 10000m

5 : 10000

1 : 2000

So option C is the correct answer. 

Explanation 

we have to find 50 Paisa to 5 rupees

we know that 1 rupee = 100 Paisa

therefore 5 rupees = 100 × 5 = 500 Paisa

hence ratio between them :-

=> 50 : 500

=> 1 : 10

So option B is the correct answer. 

Number of students good in Math = 

So, number of students not good in Math = 

⅛*100=½*25=12.5%. For fraction to percentage , we multiply the fraction by 100

  75% of 1kg

= 75/100 x 1000

= 750g 

So option C is the correct answer. 

 5% can be written as  5 / 100 = 1/20

So option D is the correct answer.  

We know that 1kg = 1000 g

Given, 15kg  = 15000 g

15kg to 210g = 15000 : 210

                      = 15000/210
         
                      = 500 : 7.

We know 20% can be written as : 

20 / 100 = 1 / 5

So option D is the correct answer.