skyvelvet:

how many marks is this 525cm qn? thanks

2 marks

Randomperson21:

However, it is not both sides of length that are filled only 2 breadth and 1 length

In the question it says the bulbs are distributed around the perimeter of rectangular field even though the figure shows bulbs on one side of the length to give a view of how they are put.. on the length it shows \".............\" to illustrate the figure
How can the bulbs will be put on only two breadths and on one length while showing the whole rectangle?
believe this is the trap..

For Paper 2 question 5 the answer is 325

There are total 18 bulbs distributed along the perimeter of a rectangular field. There are 5 bulbs on one side of the field out of which 2 bulbs are on the two corners of the field. What is the length of the field?
Since there are 5 bulbs there are 4 intervals. Each interval is 260/4 = 65.
On one side of the breadth there are 5 similarly there will be another 5 on the opposite breadth. This is a total of 10 bulbs. There are 8 bulbs (18-10) to be distributed across the remaining "two sides" of the length. That would be 4 each on each side. 8/2 =4
There would be 5 intervals on each side of the length. 5 * 65 = 325
Alternatively, if you don’t distribute the remaining 8 bulbs on both sides there will be 9 intervals and the length would be 9*65 = 525
I think the answer is 325 and not 525.