The average weight of a certain number of students in a group was 72 kg . If 11 students, with an average weight of 76 kg each, leave the group , and 5 students , each with an average weight of 79 kg, join the group, the average weight of the students in the group decreases by 0.6 kg. The number of students initially in the group was:
Refer to the given table and answer the question that follows.
What was the revenue of the company if the expenditure was ₹600 crores in the year when its percentage profit was the maximum ?
Find the simple interest (in ₹) on ₹2500 as a sum borrowed at 7% per year rate of interest for 5 years.
The least number of square tiles required to pave the ceiling of a room 525 centimetre long and 378 centimetre broad is:
By selling an article for ₹20, a dealer makes a profit of 10%. By how much should he increase his selling price (in ₹, rounded off to two decimal place) so as to make a profit of 20%?
A grocer mixes two varieties of tea worth ₹120/kg and ₹125/kg in a ratio to produce a new variety worth ₹122/kg. What is the ratio of the varieties to be mixed to obtain the new variety?
A retailer allows a trade discount of 25% and a further discount of 8% on the marked price of the products, if paid along with his shop's membership card. He makes a net profit of 15% on the cost. By what percentage are the products marked up by him?
Ravi goes to college from his village at the speed of 5km/h and returns at the speed of 4km/h. If he takes 9 hours in all, find the distance (in km) between the village and the college.
Two trains running towards each other on parallel tracks, at speeds of 45 km/hr and 51 km/hr, take 21 seconds to cross each other. If the length of one train is 290 m, then the length (in m) of the other train is:
The ratio of the present ages of Ram and Shyam is 3: 4, and 4 years ago the ratio was 2: 3. What will be the ratio of the ages of Ram and Shyam 4 years from now?
A borrows ₹89,500 for 3 years at 7% p.a. simple interest. B borrows the same amount at simple interest of 9% for the first year, 8% for the second year, and 7% for the third year. What is the total simple interest (in ₹) paid by A and B?
The average of 9 numbers is 3. If the average of the first 8 of these numbers is 2, the 9 th number is:
A cylindrical tank of height 10 m and radius 5 m has a small circular cut of 0.5 m radius on its top surface. What would be the total surface area of the tank?