Exams

The radius and the height of a cone are each increased by 20%. Then the volume of the cone increases by

Product of digits of a 2-digit number is 18. If we add 63 to the number, the new number obtained is a number formed by interchange of the digits. Find the number.

A boat goes 15 km upstream and 10 1/2 km down stream in 3 hrs 15 min. It goes 12 km upstream and 14 km downstream in 3 hrs. What is the speed of the boat in still water?

What is the slope of the line parallel to the line passing through the points (6,­3) and (2,­1)?

The rate of simple interest per annum at which a sum of money double itself in 162⁄3 yrs. is

In ΔABC, ∠B is right angle, D is the mid point of the side AC. If AB = 6 cm, BC = 8cm, then the length of BD is

In which of the following market forms, a firm does not exercise control over price?

Among four bags, average weight of last three bags is 18 kg and the average weight of first three bags is 19 kg. If the weight of last bag is 22 kg, then what is the weight (in kg) of first bag?