Question

in a hostel It cost rupees 1800 to 50 children for 8 weeks for what length of time did the cost of keeping 90 children amount to Rupees 21060

Answer 1

1800 rupees 50 children = 8 weeks
1800 rupee 1 child = 8*50 weeks
1 rupee 1 child = (8*50)/1800weeks

21060 rupee 1 child = (8*50*21060)/ 1800 weeks
21060 rupee 90 children= (8*50*21060)/ (1800*90) = 8,424,000/ 162000= 52 weeks