Bhuvnesh has drawn an angle of measure 45⁰7’ when he was asked to draw an angle of 45⁰. The percentage error in his drawing is 

x-y=2, xy=24, then the value of (x²+y²) is:

The speed of a boat in still water is 10 km/h. The speed of the stream is 2 km/h. What is the total distance that the boat will travel if it is rowed for 4 hours upstream and 3 hours downstream?

G is the centroid of ΔABC. The medians AD and BE intersect at right angles. If the lengths of AD and BE are 9 cm and 12 cm respectively; then the length of AB (in cm) is?

For what value of k, the system of equations kx + 2y = 2 and 3x + y = 1 will be coincident? 

The in-radius of an equilateral triangle is of length 3 cm. Then the length of each of its medians is 

Kuldeep sells an article for ₹ 3240 and earns a profit of 20%. What is the cost price of the article?

A contractor undertakes to make a road in 40 days and employs 25 men. After 24 days, he finds that only one- third of the road in made. How many extra men should he employ so that he is able to complete the work 4 days earlier?