If (10 a³+4b³):(11a³-15b³)=7:5, then (3a+5b):(9a-2b)=?

If the price of a commodity is decreased by 20% and its consumption is increased by 20%, what will be the increase or de- crease in the expenditure on the commodity?

Directions: The following pie chart show proportion of population of seven villages in 2009. Stud the pie chart and answer question that follows:

If the below poverty line population of the village 'X' is 12160, then the population of village 'S' is 

Directions: The pie– chart shows the proposed outlay for different sectors during a Five–Year plan of Government of India. Total outlay is Rs. 40,000 crores. By reading the pie–chart answer the following three questions.

What is the ratio between the proposed outlay of Irrigation and Communication?

if $${{5x-7}\over 3}+2={{4x-3}\over 4}+4x$$, then the value of (8x+5) is

(49)¹⁵ – 1 is exactly divisible by: 

If the speed of a boat in still water is 20 km/hr and the speed of the current is 5km / hr, then the time taken by the boat to travel 100km with the current is

Diagonal of a given square is 4√2 cm. What is the diagonal of the other square whose area is double of the given square?