Question

in a hostel it costs 1800rs. to keep 50 children for 8 weeks . for what length of time did the cost of keeping 90 children amount to 21060rs.

Answer 1

Cost of keeping 50 children for 8 weeks = Rs. 1800
Cost of keeping 50 children for 1 week = Rs. $\frac{1800}{8}$
Cost of keeping 1 child for 1 week = Rs.$\frac{1800}{8*50} = Rs. 4.5 Cost of keeping 90 children for 1 week = Rs. 4.5*90 =  Rs.405 Rs. 21060 will be enough to keep 90 children for [tex]\frac{21060}{405}$ = 52 weeks.