A train travelling at a constant speed crosses a pole in 12 seconds whereas cross a tunnel 198 metre long in 30 seconds. Find the length of train.

In a factory 60 % of the workers are above 30 years and of these 75 % are males and the rest are females. If there are 1350 male workers above 30 years, the total number of workers in the factory is: 

The number of digits in the square root of 625686734489 is 

A tourist spends daily as many rupees as the number of days of his total tour. If his total expenses were ₹ 361, then how many days did his tour last? 

The average of 12 number is 42. If a 13th number is added, then the average becomes 44. What is the 13th number?

If sinθ – cosθ = 7/13 and 0⁰ < θ < 90⁰ , then the value of sinθ + cosθ is :

If $${144\over0.144}={14.4\over x}$$, then the value of x is

What is the simple interest when Rs. 13000 get the interest Rs. 6,370 in the $$ {3{1\over 2}}$$ year?