Olympiad Test : Ratio And Proportion - 1 - Class 6 MCQ

12 boys can dig a pitch in 12 hours
∴ 1 boy can dig a pitch in 12 × 12 hours
Hence, 18 boys can dig a pitch in 
= 8 hours 

Here, 2x + 3x + 5x = 180
⇒ 10x = 180
 
∴ Largest angle = 5x = 5 × 18 = 90°

In 36 days the work is finished by 36 men
In 1 day the work is finished 36 × 36
On 24 days the work is finished 
= 54 men 

If x, y, z are in proportion then

No. of envelops
 

Weight of 65 magazines = 13 kg
∴ Weight of 1 magazine = 13/65 kg
Weight of 80 magazines 

The ratio of boys to girls is given as 9 : 5. This means for every 9 boys, there are 5 girls.

Let the number of boys be 9x and the number of girls be 5x.

The total strength of the school is the sum of the number of boys and girls, which is 994. So, we have the equation:

9x + 5x = 994
14x = 994
x = 994/14 = 71

Now, to find the number of girls, we use 5x:

Number of girls = 5x = 5 x 71 = 355

Thus, the correct number of girls is 355.

Given,

Given,
2x + 3x + 5x = 1020
⇒ 10x = 1020
⇒
∴ Share of C = 5 × 102 = 510