The difference of simple interest from two banks on ₹8,000 in 3 years is ₹800. If the rate of interest per annum in two banks are R1 and R2, then what is the value of R1 - R2? (Where R1 > R2)

A 900 metre long train crosses a 1200 metres long platform completely in 70 seconds. What is the speed of the train?

Directions:  Study the bar-graph given below & answer the questions.
Pie-chart given below shows the percentage distribution of total no. of boys in six different Schools.
Total Boys in all schools together = 6400

If ratio of girls to total students in school E is 3 : 5. Then find difference of boys in school D to girls in school E?

A work is done in 12 days by a team of 10 men, the same work is completed by a team of 10 women in 6 days. If both work together then in how many days the same work can be completed-

If a(tanθ+cotθ)=1, sinθ+cosθ=b and 0°<θ<90°, then the relation between a and b.

A semicircle is folded to make a cone. Find the height (in cm) of the cone if diameter of the semicircle is 28 cm?

At the rate of 8 % simple annual interest, if an amount becomes Rs. 819 in 3 years and 3 months, then what was the original amount?

In ΔABC θ is an acute angle and tanθ is equal to three times of cotθ. Find the value of $$ {sin^{2}θ+cosec^{2}θ-{1\over 2}cot^{2}θ}$$.