A boat goes 75 km upstream in 3 hours and 60 km downstream in 1.5 hours. Then the speed of the boat in still water is: 

The minimum value of 16 tan² θ + 25cot² θ is

If for an edition of the book, the cost of paper is Rs. 56250, then find the promotion cost for this edition?

Directions:Study the following table carefully to answer these questions:

Percentage of Marks obtained by six students in six subjects

Marks obtained by C in Maths are approximately what per cent of his total marks obtained in all the six subjects together ?

Vivek and Raja had some books whose ratio was 7: 9 and similarly the ratio of books of Abhishek and Raja was 7: 15, then tell us what was the ratio of books of Vivek and Abhishek?

A and B started a boutique investing amounts of ₹ 35,000 and ₹ 56, 000 respectively. If A ' s share in the profit earned by them is ₹ 45, 000 then what is - the total profit earned?

Three partners invested Rs. 42000, Rs. 48000 and Rs. 32000 respectively. partnership condition is that, each will the get interest on his capital at the rate of 7 % p. a. and the remaining profit will be divided in the ratio of their capitals. If at the end of the year the total profit is Rs. 32940, then find the share of A in profit. 

The ratio of the present age of P and Q is 2: 3. The ratio of their age after 18 years will be 4: 5. What is the present age of Q?