Sam can mow a lawn in 20 min, while takes 10 min longer to mow the same lawn. How long will they take to mow the lawn if they work together?

If two planes leave the same airport at 1:00 pm, how many km apart will they at 3:00 one traverls directly at...

If an inspector rejects 0.8% of a product as defective, how many units of the produce? will he examined in ord...

A two digit number has 3 in its unit digit. The sum its digits is one seventh of the number itsself. What is t...

A wholesaler sells goods to a retiler at profilt of 20%. The retailer sells to the customs ,Who pays 80% more...

If an integer y is subtracted from an integer x, and the result is grater than x, then y must be.

A train went 300 km from City to city at an average speed of 100 km/h. At what speed did it travel on the way...