For the following questions answer them individually
A and B can together do a piece of work in 6 days and A alone can do it in 9 days. The number of days B will take to do it alone is
The length of the two parallel sides of a trapezium are 16 m and 20 m respectively. If its height is 10 m, its area in square metres is
Rs. 490 is divided among A, B and C such that A's share is half that of B's and thrice that of C's. What is C's share?
A dealer sold an article at 6% loss. Had he sold it for Rs. 64 more, he would have made a profit of 10%. Then the cost of the article is
There are 1400 students in a school, 25% of those wear spectacles and 2/7 of those wearing spectacles are boys. How many girls in the school wear spectacles?
A man can row upstream at 12 km/hr and downstream at 18 km/hr. The man's rowing speed in stillwater is
If ab=21, then $$\frac{(a+b)^2}{(a-b)^2}=\frac{25}{4}$$ then $$a^2+b^2+3ab$$ the value isÂ
