Question
The length of a rectangular field is 40 m and its
breadth is 25 m. Find the area and the cost of fencing it all around at Rs 50 per metre.Solution
Area = length × breadth = 40 × 25 = 1000 m² Perimeter = 2 × (40 + 25) = 2 × 65 = 130 m Cost of fencing = 130 × 50 = Rs 6500 Answer: Area = 1000 m², fencing cost = Rs 6500.
What is the overall average of marks for all the students if three groups consist of 45, 35, and 40 students with average marks of 40, 60, and 45, respe...
The average wage of a group of 20 labourers is Rs. 500. If 4 persons receiving average wage of Rs. 360 leave the group and 2 persons receiving average w...
A student’s average score in 8 tests is 56 marks. After the 9th test, his average becomes 58 marks. How many marks did he score in the 9th test?
If average weight of a class is ‘y’ kg. If a new student weighing 21 kg took admission, then the average weight is increases by 1 kg. If the...
The average score obtained by 25 students in a class test is 68 marks. The top place was shared by 3 people who got the same score. If the lowest score ...
The average number of sweets distributed in a class of 90 students is 6. If lsquo;xrsquo; number of students newly joined the class and the average beco...
The average age of 14 girls is 42 years. If the age of two more girl is added the average decreases by one and a half year. What is the sum of the age o...
Average marks scored by Vineet in five subjects are 85. The average marks scored by him (excluding his highest and lowest marks) are 70 and lowest marks...
Average weight of a team of 13 persons is 33 kg. When one more person joins the team, the average weight of the team increases by 4 kg. Find the weight ...
A frustum of a cone has radii of 5 cm and 3 cm, and a height of 8 cm. What is its volume?
Relevant for Exams:
