A train crosses a platform which is 120 m long in 14 seconds and the same train crosses a static pole in 8 seconds. Find the length and speed of the train.

Sol. Let the length of the train be x [if gte msEquation 12]>

If Rs. 4000 becomes Rs. 5760 in 2 years at compound interest (compounded annually), then what is the annual rate of interest?

What sum of money must be given at simple interest for 9 months at 5% per annum in order to earn Rs. 360 interest?

At what % of simple interest per annum will Rs. 400 amount to Rs. 520 in five years?

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