'The total surface area of a cube is 600 sq cm, what will be the length of its diagonal?

A shopkeeper charges his customers 15% above the cost price, if a customer has bought a sofa-set for 9039, then for how much did the shopkeeper buy it?

The volume of a cuboid is 2 times the volume of a cube. If the dimensions of the side are 9 cm by 8 cm and 6 cm, then the total surface area of the cube is

The product of the zeroes of the quadratic polynomial x²+7x+ 10 is

A, B and C can do a piece of work in 15 days. B and C can complete the work in 20 days. In how many days can A alone complete the work?

Find the LCM and HCF of 27 and 81.

How many kilometers will a cyclist cover in 2 hours 20 minutes with a speed of 5 meters per second?

When the tax on an article is increased by 20%, its consumption is decreased by 20%. In total tax receipt on this item-