Which book refers that King Subahu’s capital was

The ratio of the outer and the inner circumference of a circular path is 5: 4. If the path is 100 meters wide, then what is the radius of the inner circle?

If tanx+secx=3, then the number of real solutions in [0,3π] is:

{√676.12 + 13.01² – 146.89 } = ?

If sin⁴ x + cos⁴ x = 5/8, then the value of sin2x is

Find the simple interest on Rs 1040 at 12% per annum for 2 years? 

The following table shows the number of students enrolled in different courses at a university:

The ages of P, Q, and R are in the ratio 2:3:5. After 5 years, the sum of their ages will be 75 years. What are their present ages?

f(x)=x+ ∣ x ∣ , then the function is: