A solid sphere of diameter 17.5 cm is cut into two equal halves. What will be the increase (in cm²) in the total surface area?

If 999x + 888y = 1332 and 888 x + 999y = 555.then the value of (x + y) is-

The sum 9 + 16 + 25 + 36 +_______+ 100 is equal to?

Cost of a diamond varies directly as the square of its weight. A diamond broke into four pieces with their weights in the ratio 1 : 2 : 3: 4. If the loss in the total value of the diamond was Rs.7000, the price of the original diamond was

The length of a chord which is at a distance of 12 cm from the center of a circle of radius 13 cm is 

Running at a speed of 60 km per hour, a train passed through a 1.5 km long tunnel in two minutes, what is the length of the train?

The total surface area of a hemisphere is 166.32 sq cm, find its radius? 

The ratio between the monthly income of A, B and C is 2 : 3 : 5. If C's monthly income is Rs. 1500 more than the A's monthly income, then find the B's annual income.