Question
If the length and breadth of a rectangle are in the
ratio 4:3 and its perimeter is 28 cm, then the area of the rectangle (in cm²) is :  ÂSolution
Using the formula, Perimeter = 2(l + b) & Area = length x breadth Let the length and breadth of the rectangle be 4x and 3x cm respectively. Then, 2(4x + 3x) = 28 ⇒ 14x = 28 ⇒ x = 28/14 = 2 Therefore, length = 4x = 8 cm Breadth = 3x = 6 cm Therefore, area = lb = 8 x 6 = 48 cm²
A can complete a task in 20 days, and B can complete it in 25 days. When B and C collaborate, they can finish the same task in 75/8 days. Now, if A and ...
- Two workers, A and B, can finish a task in 36 days and 48 days respectively, working alone. How many days will they take to complete the work together?
- If Arjun can complete his work in 28 days by working 4 hours a day, how many hours a day should he work to finish the same work in 16 days?
Ajay started a work and left working after 8 days. Vijay finished the remaining work in next 36 days. Had Ajay left the work after working for 12 days t...
'Amit' can finish a __ percentage of work in 4 days on his own. 'Bishnu' requires 4 days less than 'Amit' to complete the same task individually. Conseq...
"Bhanu" is 37.5% more productive than "Anurag," the two of them can finish the entire task in 40 days. Determine how long it took "Anurag" by himself to...
Ashish and Anil can do a piece of work in 12 days and 15 days respectively. Ashish completed 30% of the work. Find the time taken by Anil to complete th...
- A team of workers can finish a task in 36 days. However, 5 workers leave the task every day, and it gets done in 48 days. Find the time needed for 90 worke...
Rahul, Sameer, and Dinesh can complete a task in 24 days, 36 days, and 18 days, respectively. They started working together, but ...
A and B together can complete a piece of work in 35 days while A alone can complete 50% of the work in 20 days. Find the time taken by B to complete 12....
Relevant for Exams:
