For the following questions answer them individually
What is the value of $$\frac{\left(45 \times 3 \div 27 \times 4\right)\left(81 \div 5 \times 85 \div 51\right)}{\left(108 \div 18 \times 7 \div 21\right)\left(133 \times 3 \div 38 \times 4\right)}?$$
If the radius of a sphere is 3/4 of the radius of a hemisphere, then what will be the ratio of the volumes of sphere and hemisphere?
A boy can swim in still water at speed of 40 km/hr. If the speed of the current would have been 15 km/hr, then find the time in which the boy could swim 25 km upstream.
Tina can do a work in 15 days and Manya can do a the same work in 18 days. If they for 6 days, then what is the fraction of work is left?
A shopkeeper buys pencils from a wholesaler at Rs. 20 for 40 pencils. He sells those pencil at Rs 20 for 20 pencils.
What was his profit or loss percent?
15 books were sold for Rs. 2200 thereby gaining a cost price of 5 books. Find the cost price of a book .
In a class of 70% are remaining are boys. If the average of the girl's marks is 30 and that of the boys is 40, what is the average mark for the whole class?
Find the value of $$24 + \left[ 33 + 40 \ of \ \left\{3 \times \left(5 - 44 + 50\right)\right\}\right]$$.
If the third proportion to 10 and x is 90 and the third proportion of 12 and y is 27. Find the value of (x + y).
A person sold 28 articles for Rs. 2800 and incurred a loss of 20%. How many articles should he sell for Rs. 4400 to make a profit of 10%?
