If A's salary is 25% more than B's salary, then B's salary is how much lower than A's salary?

An alloy contains the copper and aluminum in the ratio of 7:4. While making the weapons from this alloy, 12% of the alloy got destroyed. If there is 12 kg of aluminum in the weapon, then weight of the alloy required is :

• [A] 14.4 kg
• [B] 37.5 kg
• [C] 40 kg
• [D] 48 kg

The actual area of a rectangle is 60 Cm², but while measuring its length a student decreases it by 20% and the breadth increases by 25%. The percentage error in area, calculated by the student is :

• [A] 5%
• [B] 15%
• [C] 20%
• [D] No change

If two numbers are respectively 30% and 40% more than a third number, what percent is the first of the second?

• [A] 92(6/7)%
• [B] 84(4/5)%
• [C] 80%
• [D] 75%

In a certain school, 20% of students are below 8 years of age. The number of students above 8 years of age is 2/3 of the number of students of 8 years of age which is 48. What is the total number of students in the school?

• [A] 72
• [B] 80
• [C] 120
• [D] 150
• [E] 100

Australia scored a total of X runs in 50 overs. India tied the scores in 20% less overs. If India's average run rate had been 33.33% higher the scores would have been tied 10 overs earlier. Find how many runs were scored by Australia?

• [A] 250
• [B] 240
• [C] 200
• [D] 190
• [E] Can't be determined