A sum of money is paid back in two annual instalments of INR 17640 each allowing 5% compound interest compounded annually. The sum borrowed was
The portion of a ditch 48 m long, 16.5 m wide and 4 m deep that can be filled with stones and earth available during excavation of a tunnel, cylindrical in shape, of diameter 4 m and length 56 m is
[Take∏=22/7]
There would be a 10% loss, if rice is sold at INR 54 per kg. To earn a profit of 20%, the price of rice per kg will be
In a school there were 1554 students and the ratio on the number of the boys and girls was 4:3. After few days, 30 girls joined the school but few boys left; as a result the ratio of the boys and girls became 7 : 6. The number of boys who left the school is
The diameter of each wheel of a car is 70 cm. If each wheel rotates 400 times per minute, then the speed of the car (in km/hr) is [Take ∏ = 22/7]
If (3x-2y) : (2x+3y) 5:6 then one of the value of [3√x+3√y/3√x-3y]2 is