What should be added to $$ {10 \ over 11} $$ to get the sum $$ {11 \ over 10} $$?

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

A dozen pairs of socks quoted at 180 are available at a discount of 20 %. How many pairs of socks can be bought for 48? 

A man walking at a speed of 5 km / h crosses a bridge in 15 minutes, find the length of the bridge.

What is the angle between the two hands of the clock at 8:24 pm?

A student got 30% marks in an examination and failed because he got 12 marks less. Another student got 40% marks in the same examination and got 18 marks more than the minimum passing marks. Must have marks to pass

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

A, B , C can finish a work in 10, 12, and 15 days respectively. They start working together. If B stops after 2 days, how long would it take A and C to finish the remaining work