Question

Q.7 If weight of 12 books is 900 grams. What will be the weight of 15 such books?

Q.8 In a parallelogram ABCD, AB= 2x+1 and CD= 5x-2. Find the value of x.

Answer 1

Answer:

Q7 - 13500 g

Q8 - 31:35

Q.7) If weight of 12 books is 900 grams. What will be the weight of 15 such books?

Solution:-

12 book gram 900

than 1 book gram 900/12 = 75

therefore 15 book gram as 75 × 15 = 1125

Q8)In a parallelogram ABCD, if AB=2x+5, CD=y+1, AD=y+5 and BC=3x-4 then the ratio of AB:BC is

Solution:-

In parallelogram , opposite sides are congruent

And y=-4-26=30,Then AB=CD =2×13+5=31,And AD+BC=3×13−4=35,AB:AD=31:35