For the following questions answer them individually
The area of a triangle ABC is 63 sq. units. Two parallel lines DE, FG. are drawn such that they divide the line segments AB and AC into three equal parts. What is the area of the quadrilateral DEGF?
Working together, P, Q and R reap a field in 6 days. If P can do it alone in 10 days and Q in 24 days, in how many days will R alone be able to reap the field?
A shopkeeper marks the price of an article at Rs. 320. Find the cost price if after allowing a discount of 10%, he still gains 20% on the cost price.
