|
A man walks 6 km at a speed of 1 1/2 kmph, runs 8 km at a speed of 2 kmph and goes by bus another 32 km. Speed of the bus is 8 kmph. Find the average speed of the man.
|
Answer
|
|
Two men start together to walk a certain distance, one at 4 kmph and another at 3 kmph.The former arrives half an hour before the latter. Find the distance.
|
Answer
|
|
One type of liquid contains 25 % of benzene, the other contains 30% of benzene. A can is filled with 6 parts of the first liquid and 4 parts of the second liquid. Find the percentage of benzene in the new mixture.
|
Answer
|
|
A jar contains a mixture of two liquids Acid( nitric acid) and Base(ammonium chloride) in the ratio 4 : 1. When 10 litres of the mixture is taken out and 10 litres of liquid Base is poured into the jar, the ratio becomes 2 : 3. How many litres of liquid Acid was contained in the jar?
|
Answer
|
|
What must be added to each of the numbers 7, 11 and 19, so that the resulting numbers may be in continued proportion?
|
Answer
|
|
The mean proportional between 45 and a certain number is three times the mean proportional between 5 and 22. The number is ?
|
Answer
|
|
The average salary of all the employees in a small organization is Rs 8,000. The average salary of 7 technicians is Rs 12,000 and the average salary of the rest is Rs 6,000. The total number of employees in the organisation is?
|
Answer
|
|
Without any stoppage, a person travels a certain distance at an average speed of 42 km/h, and with stoppages he covers the same distance at an average speed of 28 km/h. How many minutes per hour does he stop?
|
Answer
|
|
If two dice are thrown simultaneously, then find the probability that the sum of numbers appeared on the dice is 6 or 7?
|
Answer
|
|
The probability that Alex will solve a problem is 1/5. What is the probability that he solves at least one problem out of 4 problems?
|
Answer
|
