A fruit vendor purchased 35 dozens of apple at TK. 10 per dozen. Out of those, two dozens got rotten and he sold 28 dozens at Tk. 12 per dozen. Remaining apples were sold by him for Tk. 15 per dozen. Find the amount of total profit made by the vendor in this business.

$\sec A+\tan A=\frac{5}{2}$ হলে $\sec A-\tan A=?$

A and B invest in a business in the ratio 3:2. If 5% of the total profit goes to charity and A's share is Tk. 855, total profit is _?

Find the missing number in the series 3, 6, 18, 72, 360, _

If a boy takes as much time in running 10 min. a car takes in covering 25 m, the distance covered by the boy's during the time the car covers 1 km is?

Shima has $\frac{4}{5}$th of a tank of fuel in his car. He uses $\frac{1}{10}$th fraction of a tank per day. How many days will his fuel last?

The length of rectangle ABCD is $\frac{6}{5}th$ of it's breadth. Its perimeter is 132. What is it's area?