Working 8 hours a day, Sohan writes a book in 18 days. How many hours per day should he write to write the entire book in 12 days?

A train travelling at 48 km/hr crosses an another train half of its length and travelling in opposite direction at 42 km/hr in 12 seconds. It also passes a railway platform in 45 seconds. The length of the railway platform Is

A line touches a circle of a radius 6 cm. Another line is drawn which is tangent to the circle. If the two lines are parallel then the distance between them is:

Two numbers are 30% and 37% lesser than a third number. By how much percent is the second number to be enhanced to make it equal to the first number?

Each internal angle of regular polygon is two times its external angle. Then the number of sides of the polygon is: 

A machine is marked at ₹ 6,800 and available at a discount of 10%. The shopkeeper gives another off-season discount to the buyer and sells the machine for ₹ 5,202.  Find the offseason discount. 

Given that DE || BC, AD : DB = 3 : 4, find out ar(∆ADE)/ar(∆ABC)?

A started a business with a capital of Rs.1,12,000. After 2 months, B joined the business with a capital of Rs.80,000 and after another 2 months, C joined the business with a capital of Rs.72,000. After 10 months from the start of the business, B withdrew Rs.8,000 and C also with drew Rs.8,000. If B received Rs.9,800 as his share in the profit at the end of a year, then the total profit was: