A can do $$1\over 3$$ of a work in 30 days. B can do $$2\over 5$$ of the same work in 24 days. They worked together for 20 days. C completed the remaining work in 8 days. Working together A, B and C will complete the same work in:

32 is what percentage of 80?

Directions : Study the following graph and answer the questions.  

In 2005, the exports of company X were double that of company Y in that year. If the imports of company X during the year were 180 crores, what was the amount (in crore) of imports of company Y during the year? 

If the areas of two isosceles triangles are in the ratio of X² : Y², then the ratio of their corresponding heights is:

Point P lies outside a circle with centre O. Tangents PA and PB are drawn to meet the circle at A and respectively. If ∠APB =80⁰, then ∠OAB is is equal to:

Chord AB of circle of radius 10 cm is at a distance 8 cm from the centre O. If tangents drawn at A and B intersect at P, then the length of the tangent AP (in cm) is:

What is the mode of the given data?

5, 7, 9, 7, 3, 7, 5, 7, 8, 6, 7

A hemispherical tank full of water is emptied by a pipe at the rate of 7.7 litres per second. How much time (in hours) will it take to empty $$2\over 3$$ part of the tank, if the internal radius of the tank is 10.5 m?