Amongst the following, which state celebrates

A pipe can fill a tank in 6 hours, while another pipe can empty it in 8 hours. If both pipes are opened together, how long will it take to fill the tank?

If sinθ = 3/5 and θ is an acute angle, find cos θ.

Find the area enclosed between the curves y=(x−4)² and y=16−x²over their intersection interval.

The ratio of milk and water in a mixture of 28 litres is 4 : 3. Find the quantity of milk in the mixture? 

A spherical metallic shell with 6 cm external radius weighs 6688 g. What is the thickness of the shell if the density of metal is 10.5 g per cm³

? = (597.98 ÷ (6.97 ^2.01 – 3.1)) × 12.9