Answer:
Step-by-step explanation:No profit, no loss.
Total CP =3000+3000=Rs.6000
SP of I =
100
(100+20)
×3000=Rs.3600
SP of II =
100
(100−20)
×3000=Rs.2400
Total of SP =Rs. 3600+Rs. 2400=Rs. 6000
∴ no profit, no loss
Answer:
Assuming that
is a diameter.
Given that 
And that point O is the center of the circle

Explanation:
Because angle AOB is subtended by arc AB from point O.
Arc AB is equal to the measure of that angle.
Since arc ABC is subtended by the diameter, the arc is 180°.
Answer: There is more than one answer, any of these will do
3, 5, 25
5, 7, 33
7, 9, 41