Mean proportional of 10√m and 40√m is
There is a square park in the society. The management wants to put a circular fountain at the centre of the park with diameter 14 m. The remaining area is to be covered with grass. If the cost of laying grass is Rs. 20 per m2 and the cost of constructing the fountain is 10 per m2 . Find the length of the field if the total cost incurred is Rs.6460 .( Use π = 22/7)
Question 8
A door of length 2 m and breadth 1 m is fitted in a wall. The length of the wall is 4.5 m and the breadth is 3.6 m. Find the cost of whitewashing the wall, if the rate of whitewashing the wall is Rs. 20 per m2.