To calculate distance, speed or time given the other two variables: Draw a formula triangle close formula triangleA tool to help decide which calculation is needed to work out speed, distance, or ...

Practise calculating distance, speed and time using a bar model Practise calculating distance, speed and time using bar models. You might need a pen and paper to help with your answers.

It is absolutely incorrect. The correct formula is to count the number of seconds between the flash of lightning and the resulting crash of thunder, then divide that number of seconds by five.