The diameter of a circle is 112 cm. What is the circumference of this circle? [use $$π={22\over 7}$$]

24 women take 14 days to complete a piece of work which can be completed by 14 men in 12 days. 18 men started working and after 5 days, 10 men left and 8 women joined them. How many days will it take them to complete the remaining work?

The east positive integer that should be subtracted from 3011 x 3012 so that the difference is a perfect square is-

Train A takes 1 hour more than train B to travel a distance of 720 km. Due to engine trouble speed of train B falls by one third, so it takes 3 hours more than Train A to complete the same journey. What is the speed of Train A (in km/hr)?

Evaluate the following.

sin 25° sin 65° – cos 25° cos 65°.

The average of 8 numbers is 27. If each of the numbers is multiplied by 8, find the average of new set of numbers.

A can do a piece of work in 6 days, B in 10 days and C in 15 days. They jointly complete the work and earn Rs.300. The sum of their wages for 2 days is                                              

Triangle PQR is inscribed in the circle whose radius is 14 cm . If PQ is the diameter of the circle and PR =10 cm , then what is the area of the triangle ?