View in English View in Hindi |
175 men can dig a canal of 3150 meters long in 36 days. How many men are required to dig a canal of 3900 meters long in 24 days? |
A) 325 B) 350 C) 375 D) 400 Correct Answer : 325 Explanation : 175 men*36 days / X men*24 days = 3150 meters/3900 meters So, 325 men are required. |
A bag contains red, blue and black balls. The ratio of red to blue balls is 3 : 5. The ratio of black to red balls is 3 : 4. What is the ratio of blue to black balls? |
A) 5 : 3
B) 4 : 5
C) 9 : 20
D) 20 : 9
Correct Answer : 20 : 9 Explanation : ratio of red to blue balls= red / blue = 3 / 5 ratio of black to blue balls= (black / red) * (red / blue) Hence, ratio of blue to black balls = 1 /(9/20) = 20/9 |