Richard works at an ice cream shop. Regular comes get 2 scoops of ice cream, large cones get 3 scoops. One hotnsaturday Richard scooped 234 regular cones and 156 large cones. One scoop of ice cream is 3 ounces. A tub of ice cream weighs 10 pounds. How many tubs of ice cream did Richard use to make the cones

Given that one regular cone uses 2 scoops of icecream

Richard scooped 234 regular cones

so amount of scoope in regular cones = 2*234 scoops.

Given that one large cone uses 3 scoops of icecream

Richard scooped 156 large cones.

so amount of scoope in large cones = 3*156 scoops.

Total scoops used = 2*234+3*156 = 468+468 = 936 scoops

Given that one scoop of ice cream = 3 ounce

then 936 scoops = 936*3 ounce = 2808 ounce

Given that 1 tube contains 10 pounds.

There are 16 ounces into 1 pound

so that means 1 tube contains 10*16 = 160 ounce.

Now we want to calculate numbe of tubes used

so we will divide weight of total used scoops by weight of 1 tube

which is 2808/160 = 17.55

Hence answer is approx 18 tubes.