. The product of the present ages of Sakshi and Nidhi is 320. Eight years from now, Sakshi’s age will be three times the age of Nidhi. What was the age of Sakshi when Nidhi was born?
A train travels a distance of 600 km at a constant speed. If the speed of the train is increased by 5 km/hr, the journey would take 4 hrs less. Find the speed of the train.
On selling a Pen at 5% loss and a book at 15% gain, Karim gains Rs. 7. If he sells the Pen at 5% gain and the book at 10% gain, then he gains Rs. 13. The actual price of the book is
Circumference of a circle –A istimes perimeter of a square. Area of the square is 784 sq cm. What is the area of another circle-B whose diameter is half the radius of the circle –A?
45% of 2770 + (5/4) of 1824=5×?
Two pipes A and B can fill a tank in 20 hours and 25 hours respectively and a third pipe C can empty the tank in 50 hours. All of three pipes opened together and after sometimes pipe C is closed. If total time to fill the tank from beginning is 13 hours, find after how much time pipe C was closed?
54, 77, 116, 187, 322, ?
A man covered a certain distance at some speed. Had he moved 3 kmph faster, he would have taken 40 minutes less. If he had moved 2 kmph slower, he would have taken 40 minutes more. The distance (in km) is:
Let distance = x km and usual rate = y kmph.
2y(y + 3) = 9x ....(i)
y + 3
y(y - 2) = 3x ....(ii)
On dividing (i) by (ii), we get: x = 40.
How many minutes Raman will take to cover a distance of 400 meters if he runs at a speed of 20 km/hr ?
Without any stoppage a person travels a certain distance at an average speed of 42 km/hr and with stoppages he covers the same distance at an average speed of 28 km/hr. How many minutes per hour does he stop?