A man crosses a diagonal of a square in 1.5 minutes with the speed of 4 k/h then the area of the square is -

A is twice fast as B and B is thrice as fast as C. The journey covered by C in 78 minutes then time taken by A to cover the same journey is-

Let ΔABC ∼ Δ PQR and ar(∆ABC)/ar(∆PQR) =4/25. If AB = 12 cm, BC = 8 cm and AC = 9 cm, then QR is equal to:

3240, 540, 108, 27, ? , 4.5

If 18 men can finish a job in 26 days, then, in how many days will 13 men finish the same job?

A sum of ₹4000 is lent out in two parts, one at 8% simple interest and the other at 10% simple interest. If the annual interest is ₹352. The sum lent at 8% is

The average age of five girls is 11. The oldest among them is 15 years old. What is the average age of the others?

Two train 120 meters and 160 meters in length are running towards each other on parallel lines at the speed of 70 kmph and 42 kmph respectively. How long will it take to cross each other after they meet?