Ram spends 30% of his salary on food, 10% on house rent, 7% on entertainment, and 6% on conveyance. If at the end of a month his savings are ₹1,880, then his monthly salary is:
A cuboidal water purifier can carry 10 litres of water. Its breadth is 1/5 of its height and length is 1/3 of the sum of the breadth and height. The height of the tank is
R wishes to use a stick of length 6 units as common internal tangent to two circles of radius two units and three units. What can be the maximum distance (in units) between the centres of the circle?