The orthocentre of a triangle is the point where
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What is the age of the eldest sister if, the sum of ages of 5 sisters born at the intervals of 3 years each is 50 years?
Which of the following numbers is completely divisible by 99?
The number of sides of a regular polygon whose exterior angles are each 72 deg is
The area and the breadth of a rectangle are 288 sq.cm and 16 cm respectively. Find the length of its perimeter (in cm).
A man can cover a certain distance in 3 hours 36 minutes if he walks at the rate of 5 Km/hr. If he covers the same distance on cycle at the rate of 24 Km/hr, then the time taken by him in minutes is
An object travels 24 m in 3 s and then another 15 m in 2 s. What is the average speed of the object?
The radius and the height of a cone are each increased by 20%. Then the volume of the cone increases by