Question 1133908
A twenty-kilogram bag of rice is consumed by m, number of boys in 10 days.
 When four more boys joined them, the same quantity of rice lasted only 8 days.
 If the rate if consumption is the same, find the value of m.
:
10m = 8(m+4)
10m = 8m + 32
10m - 8m = 32
2m = 32
m = 16 boys