A boat goes 24 km upstream and 28 km downstream in 6 hours. It goes 30 km upstream and 21 km downstream in 6 hours and 30 minutes. The speed of the boat in still water is:

Chapters. Time and Work

B is 20% efficient than A. B started the work & do it for x days. And then B is replaced by A. And A completed the remaining work in x+8 days. The ratio of work done by A & B is 3:2. In how many days A & B working together to complete the whole work?

Chapters. Partnership

A, B and C started a business and invested in the ratio of 3:4:5. After 4 months, A withdrew a 1/12th amount of what B and C invested. If the annual income was 9200, then what was the share of B?

Chapters. Compound Interest

A sum of Rs. 91,000 is borrowed at 20% per annum compounded annually. If the amount is to be paid in two years, the amount will be?

Chapters. inequalities

Which ofthe following symbols should replacethe $ and # in the given expression in order to make the expression L ≥ S and N > T isdefinitely true?

N > O ≤ L = P $ T, H > M ≤ T # S < N

Chapters. Average

Out of 12 persons, 11 spend Rs.2000 monthly each. The twelfth person spends Rs.110 more than the average spending of the 12 people. How much money does the twelfth person spend?

Chapters. Coding Decoding

In a certain code language ‘green grasseverywhere’ is written as‘dik pa sok’ and ‘cow

eats grass’ is written as ‘nok ta pa’. How is‘cow’ written in that code language?

Chapters. Ratio and Proportion

In a 40 liters mixture of acetic acid and sodium acetate are in the ratio 3:1, find the amount of sodium acetate solution to be added to make the ratio 2:3.

Chapters. Problems on Ages

The difference between the present ages of Amit and Sushil is 6 years. The ratio between their ages after 4 years will be 3 : 4 What can be the present age of Sushil?

Chapters. Profit and Loss

If an article is marked 40% above the cost price. If a discount of x% is given on the market price of the article then the final profit of 12% is obtained. Now if CP of a new article is 120 Rs. and x% profit is desired then what should be the selling price of that new article?

Chapters. Mensuration

The ratio between a height of 2 cylinder is in the ratio 3:5. Their volumes are in the ratio 27:80. Find ratio between their radius.

Chapters. inequalities

Which of the following symbols should replace the sign ($) and (#) in the given expression in

order to make the expression S > J and M ≥ Jis definitely true?

S ≥ T $ P > K ≤ N, O < M = K # J > L