Answer:

Step-by-step explanation:
Let sides of the triangle be 

Semi-perimeter (s) = 

Area of one tile 

So,
Area of 20 tiles 
Cost of polishing the floor at the rate of 2 rupees per sq.cm = 
If u separate these into 2 triangles then they will become 90 degree triangles so angle a=angle c.
Average change in altitude per minute
216.12÷2.4
=90.05m
Answer:
All of them are irrational except √9 which is rational.
Step-by-step explanation:
√5= 2.2606797749(irrational)
√9=3(rational) this one is rational
√7=2.64575131106(irrational)
√3.31662479035(irrational)
hope it helps.
Answer:
i think 120, im not quite sure, im not the best at this
Step-by-step explanation: