Quantitative Aptitude - Arithmetic Ability Questions

Two trains, one 150 m long and the other 130m long, coming from opposite directions crosssed each other in 7.2 seconds. The sum of speed of the two trains every hour would then be

The age of Rakhi is twelve times that of her daughter Anubha. If age of Anubha is 3 years now, then what was the age of Rakhi, 2 years earlier?

Determine the value of 1r+1s when r3+s3=0 and r+s=6 ?

A sum fetched a total simple interest of Rs 5320 at the rate of 7% per year in 5 years. What is the sum?

If curved surface area of a cylinder is 1386 sq cm and height is 21 cm, what will be its radius? (Take π = 22/7)

What is the simplified value of (cotA + tan B)/(cot B + tan A)?

If 7x - [3(2x - 3)]/2 = 1/2, then what is the value of x?

Average of the height of 251 students of a school is 48. If the average of the height of the boys is 51 and the average of the height of the girls is 29, then what will be the ratio of the total height of boys and the total height of girls respectively?