instruction:
The task is to generate the correct answer for a given math problem.
question:
Problem: a rectangle having length 105 cm and width 40 cm . if the length of the rectangle is increased by twenty five percent then how much percent the breadth should be decreased so as to maintain the same area .
answer:
19.23 %


question:
Problem: two pipes can fill the cistern in 10 hr and 12 hr respectively , while the third empty it in 30 hr . if all pipes are opened simultaneously , then the cistern will be filled in
answer:
6.67 hr


question:
Problem: the sector of a circle has radius of 24 cm and central angle 135 o . find its perimeter ?
answer:

104.6 cm