For the following questions answer them individually
A train running at a speed of 60 km/hr crosses a pole in 9 seconds. What is the length of the train?
If doubling a number and adding 20 to the result gives the same answer as multiplying the numberby 8 and taking away 4 from the product, find the number.
Sixteen women working 7 hours a day will complete a job in 48 days. How many women are needed to complete the same job in 32 days working 12 hours a day?
Find the value of $$\cos (A + B)$$, if $$\tan A = \frac{3}{4}$$ and $$\tan B = \frac{5}{12}$$ and $$A$$ and $$B$$ are in quadrant I.
The Simple Interest on a certain sum at the rate of 5% per annum for 3 years is Rs.1260. Find the Compound Interest for that sum at the same rate and for the same period.
