Question
The length of a rectangle is 9 metres more than its
width. If the perimeter of the rectangle is 50 metres then what is the area (in m2Â ) of the rectangle?Solution
Let the width of the rectangle = ‘x’ metres Then, length of the rectangle = (x + 9) metres Perimeter of the rectangle = 2 × (length + width) Or, 2 × (x + x + 9) = 50 Or, 2x + 2x + 18 = 50 Or, 4x = 50 – 18 = 32 Or, x = 32/4 = 8 m So, area of the rectangle = x × (x + 9) = 8 × 17 = 136 m2
Working alone, 'C' can complete a job in 30 days. 'D' takes 20% less time than 'C' to finish the same job. Calculate the percentage of work done by 'C' ...
- If Riya takes three times the time that Mahi takes or four times the time that Neha takes to finish a task, and all three working together can complete it ...
- Pipes X and Y can fill a water tank individually in 24 minutes and 36 minutes, respectively. A third pipe Z can empty the tank in 72 minutes. If all three ...
A can complete a piece of work in 24 days. He worked for 21 days and then B finished the remaining work in 6 days. In how many days can A and B finish t...
A can complete a piece of work in 10 days , and B can complete the same work in 15 days . They start working together, and after some days A leaves....
The ratio of time taken by P, Q and R to complete work alone is 4:6:3 respectively. If all three together complete the work in 8 days, then find in how ...
18 women can do piece of work in 12 days. 12 men can do the same piece of work in 9 days. Find in how many days will 8 men and 8 women complete that work?
A and B together, B and C together and A and C together can complete a piece of work in 14 days, 15 days and 18 days respectively. Find the ratio of the...
Q can do a work in 15 days and R can do the two-third work done by P and Q together in a day. If R completes the work in 18 days, how many days will it ...
A' can finish a job in 24 days, while 'B' is 25% less efficient than 'A.' If they take turns working, beginning with 'A,' how many days will it take for...
