Quantitative Aptitude - Arithmetic Ability Questions

If 2(3x + 5) > 4x -­ 5 < 3x + 2; then x can take which of the following values?

If 3 dozen guavas cost Rs. 90, how many guavas can be bought for Rs. 240?

Find the curved surface area (in cm2) of a right circular cone of diameter 28 cm and slant height 12 cm.

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)

√(cosec2 -­ 1)/cosecA is equal to?

Rs. x invested at 8% simple interest per annum for 5 years yields the same interest as that on Rs. y invested at 7.5% simple interest per annum for 6years. Find x : y.

The traffic lights at four different road crossings change after every 15 sec, 18 sec, 27 sec and 30 sec respectively. If they all change simultaneously at 6:10:00 hours, then at what time will they again change simultaneously?

Of the 3 numbers whose average is 40, the first is 1/3 rd the sum of other 2. What is the first number?