5 [1] In the figure opposite :
b
a
The two cuboids are melted to make
another cuboid whose height is (a+ b),
3b
b
3a
a
find the base area of the new cuboid.
[2] The following table shows number of students in grades the first , the second and the third preparatory in a school. Grade First Second Third
Number of students 220 200 180
1st grade 2nd grade 3rd grade
Represent the number of students in grades the second and the third prep. in the pictograph
Shorouk for Modern printing
First Term
135