In a hostel it costs Rs. 1800 to keep 50 children for 8 weeks. For what length of time did the cost of keeping 90 children amount to Rs. 21060 ?
The hostel cost for 50 children for 8 weeks is Rs.1800
The hostel cost for 1 child for 8 weeks is
The hostel cost for 1 child for 1 week is
Thus, hostel cost for 90 children for 1 week is
The cost of keeping 90 children for x number of weeks amounts to Rs.21060.
Thus, the number of weeks is 52