Two buses travel to a place at 45 km/hr and 60 km/hr respectively. If the second bus takes 5½ hours less than the first for the journey, the length of the journey is:

 The monthly income of two persons are in the ratio 2: 3 and their monthly expenses are in the ratio 5: 9. If each of themn saves ₹ 600 per month, then their monthly incomes are

If a cot θ + b cosec θ= p and b cot θ + a cosec θ = q then p² -q² is equal to _____

The product of two number is 4107. If the HCF of the number is 37. The greatest number is

Rs. 1,080 invested for 3 months gave an interest of Rs. 27. The simple rate of interest per annum was :

In a factory, the production of cycles rose to 48,400 from 40,000 in 2 years. The rate of growth per annum is?

PQRS is square whose side is 20 cm. By joining opposite vertices of PQRS are get four triangles. What is the sum of the perimeters of the four triangles?

If u : v= 4 : 7 ,  v : w = 9 : 7 and u=72 then find the value of w.