A plot of land is in the shape of a right angled isosceles triangle. The length of the hypotenuse is 50*sqrt(2). What is the cost of fencing is at Rs 3 per metre ?
Let each one of equal sides be x metres. Then x^2+x^2 = (50*sqrt(2))^2 x = 50 m. Perimeter = x + x + 50*sqrt(2) = 100 + 50*sqrt(2) Therefore cost of fencing = Rs.3 * (100 + 50*sqrt(2)) = 511.5
Wheat costing Rs. 42 and Rs. 36 per kg is mixed with third variety in the ratio 3:4:5. If this mixture cost Rs. 46.5 per kg, then what is the per kg price of wheat of the third variety?
A car owner buys petrol at Rs.7.50, Rs. 8 and Rs. 8.50 per litre for three successive years. What approximately is the average cost per litre of petrol if he spends Rs. 4000 each year?
If difference between simple interest and compound interest of certain sum of money for 3 years at 7.5% per annum is Rs 138.375 then what is the sum?
