How To Get 50% Cheaper Insurance

How long will a sum of money invested at 5% per annum SI take to increase its value by 50%?

Ram sells his goods 25% cheaper than Shyam and 25% dearer than Hari. How much percentage is Hari's goods cheaper than Shyam?

X sells his goods 25% cheaper than Y and 25% dearer than Z. How much percentage is Z's goods cheaper than Y?

A certain length of 50% solution produces an optical rotation of 20^(@). How much length of 10% solution of the same substance will produce a rotation of 30^(@)

Divide Rs 7000 among A,B and C such that A gets 50% of what B gets and B gets 50% of what C gets

Divide Rs 7000 among A, B and C such that A gets 50% of what B gets and B gets 50% of what C gcts.

A total amount of ₹ 1560 is to be divided among A, B and C such that A gets 50% of what B gets and B gets 20% of what C gets. How much will B get?