If a boat goes upstream at a speed of 24 km/hr and comes back the same distance at 40 km/hr. What is the average speed (in km/hr) for the total journey?

Four bells ring at the intervals of 5, 6, 8 and 9 seconds. All the bells ring simultaneously at some time. They will again ring simultaneously after: 

Study the given graph carefully to answer the questions that follow:

If carpenter X, Y and Z were to make a table together how many days would they take?

The cost price of an article should be increased by what percentage so that after giving 20 percent discount on it, 44 percent profit is obtained?

Study the following table carefully and answer the questions given below.

The total number of students in Agriculture in 2001 and 2005 together was approximately what percent of number of students from the same discipline in 2002?

Raman took a loan of Rs. 15000 from Laxman. He was agreed that for the first three years rate of interest charged would be at 8% Simple Interest per annum and at 10% Compound Interest (compounded, annually) from the fourth year onwards. Ram did not pay anything until the end of the fifth year. How much would he repay if he clears the entire amount, only at the end of fifth year? (inRs.)

A sum amounts to ₹ 6480 in 4 years and ₹ 9600 in 8 years when it is compounded annually. Find the sum?

Find the value of ∠x in the given figure.