A straight tree breaks due to storm and the broken part bends so that the top of the tree touches the ground making an angle of 30 ° with the ground. The distance from the foot of the tree to the point, where the top touches the ground is 10m. Find the total height of the tree 

A motorboat covers a certain distance downstream in a river in 3 hours. It covers the same distance upstream in 3 and half an hour. If the speed of the water is 1.5 km / h, then the speed of the boat in still water is: 

The difference of a number consisting of two digits from the number formed by inter changing the digits is always divisible by: 

Ratio of CP and SP is 12:13, then the profit percent is?

A person invested Rs 28000 at the rate of 8% per annum simple interest and Rs 26000 at the rate of 10% per annum compounded Interest compounded annually. What is the difference in the interest earned from two investments at the end of 3 years? 

An amount of money is to be divided among Sakshi, Aastha and Ruchita in the ratio of 3: 5: 7 respectively. If the amount received by Ruchita is Rs. 8000 more than the amount received by Aastha, what will be the average amount received by Sakshi & Aastha?

A rectangular ground 16m long and 10m breadth. It has a gravel path 2.5m wide all around it on the outside. What is the area of the path?