Quantitative Aptitude - Arithmetic Ability Questions

If a - b = -7 and a2+ b2= 85, then find ab.

If a cone of radius 3.5 cm and height 9.6 cm is melted and constructed into a cylinder of the same radius, what will be the height of this cylinder? (Take π = 22/7)

A man covered a certain distance by a train at the speed of 40 km/hr and covers the same distance back by walking at the speed of 8 km/hr. Ifthe whole journey took 12 hours, then what is the one side distance (in km)?

If x+1x=5,then the value of x1+x+x2 is

Area of _____ equals square of its side.

Select the related word/letters/number from the given alternatives.
1 : 8 :: ? :64

The ratio of two numbers is 5 : 6. If their product is 1470, then what is the sum of both the numbers?

Δ LMN is right angled at M. If m∠N = 60 deg., then Tan L =______.