A solid copper sphere of radius 1.2 cm is converted into a right circular cylinder rod of length 16 cm. The ratio of total surface area of the rod to the sphere is

The traffic lights at three different road crossings change after 24 seconds, 36 seconds and 54 seconds respectively. If they all change simultaneously at 10 : 15 : 00 AM, then at what time will they again change simultaneously? 

If $$ {y\over x-z}={y+x\over z}={x\over y}$$ the find x:y:z is?

If a =500, b=502 and c=504, then the value of a³ +b³ +c³-3abc

The measure of the angles of a triangle are in the ratio of 2 : 7: 11. Measure of angles are:

Two numbers are 90 % and 75 % lesser than a third number. By what % should the first number be increased so that it becomes equal to the second number? 

A train running at the speed of $${140\over 9} $$  m/sec, crosses a pole in 27 sec. Find the length of the train.

Find the area of triangle whose medians are 8 cm, 15 cm and 17 cm respectively?