trignometry ICSE 2002

The Shadow a vertical tower AB on the level ground is increased by 10 metres, when the altitude of the sun changes from 45 degree to 30 degrees. Find the height of the tower correct to 1/10th of a metre.

ICSE 2002

trignometry

time and money

On a certain sum of money, the difference between the compound interest for a year, compounded half yearly, and the simple interest for a year is Rs 180. Find the sum lent out, if the rate of interest in both the cases is 10%.

taxes

ratio and proportions

1-equation of straight line - ICSE 2003

Find the value of k for which the lines kx – 5y + 4 =0 and 
4x – 2y + 5 =0 are perpendicular to each other.                       
 ICSE 2003

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Trignometry ICSE 2002

trignometry ICSE 2003