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-

In a blue and yellow painting, blue and yellow are used in the ratio 4 : 3. If the ratio of blue and yellow in the upper part is 2 : 3, then in what ratio will the blue : yellow be in the lower part?

If a shopkeeper sells an article at 10% loss by giving half discount on the marked price, then what will be its cost price?

At what rate of simple interest will a sum of money double in 8 years?