What will be the area A of the quadrilateral in each case with their diagonal d cm & the sum of their heights (h1+h2) cm.
i) d=20,(h1+h2)=10
ii) d=15,(h1+h2)=20
iii) d=20,(h1+h2)=25
iv) d=40,(h1+h2)=30
The perimeter of a rectangular swimming pool is 64m. If its length and breadth are in the ratio of 11 : 5, find the length of the pool (in metre).
If 10 gms of Mg react with 20 gms of O2, then how many grams of MgO is formed?