Quantitative Aptitude - Arithmetic Ability Questions

What is the simplified value of sec4θ – sec2θ tan2θ?

If 3x - 8(2 - x) = -19, then the value of x is

If cos 21° = x/y, then cosec 21° -­ cos 69° is equal to

If √[(1 + cosA)/2] = x, then find the value of x.

If the side of a square is increased by 20%, then what will be the percentage increase in its perimeter?

A man starts moving from a place A and reaches the place B in 26 hours. He covers 1/3rd of the distance at the speed of 4 km/hr and covers the remaining distance at the speed of 5 km/hr. What is the distance (in km) between A and B?

10 identical solid spherical balls of radius 3 cm are melted to form a single sphere. In this process 20% of solid is wasted. What is the radius (in cm) of the bigger sphere?

If the measures of the angles of a triangle are in the ratio. 1:2:3 and if the length of the smallest side of the triangle is 10cm, then the length of the longest side is