Find out the approximate value which should replace the question mark (?) in the following questions. (You are not expected to find out the exact value)
For the following questions answer them individually
The average of four consecutive even numbers P. Q. R and S respectivelv is 55. What is the product of Q and S ?
The cost of 5 sharpeners and 14 pencils is Rs.56. What would be the cost of 15 sharpeners and 42 pencils ?
12 women alone can complete a piece of work in 5 days, whereas 3 women and 9 children together can complete the same piece of work in 10 days. in how many days can 36 children complete the same piece of work ?
The sum of 35% of a number and 12% of the same number is 3055. What is the 72% of that number ?