Question

Trunks wants 200 ribbons of length 110 cm for his girlfriend. However, the ribbons were sold at 25 m per tape. How many tapes will Trunks need ?
Give answer with proper explanation

Answer 1

Diligent students will note that there are two units of measurement in the question – metres and centimetres. (In case you needed reminding, 1 m is equal to 100 cm.)

The first step is to derive the number of ribbons that Trunks can cut from each tape. Since each tape is 25 m (2,500 cm) long and she wants 110 cm ribbons, we must divide 2,500 by 110, which gives us 22.72. We round this answer down to the nearest whole number (which is 22), since the excess tape cannot be used to create more ribbons.

Therefore, Trunks can get 22 ribbons from each tape.

Since Trunks wants 200 ribbons, we must divide the number of ribbons she wants by the number of ribbons each tapes produces. 200 divided by 22 gives us 9.09. We round this answer up to the nearest whole number (which is 10), since Trunks can only buy whole tapes and not partial tapes.

Therefore, Trunks needs 10 tapes for his girlfriend.