an engine of 50kg pumped water through a vertical height of 4m in 10s. calculate the power of the pump [g=10ms/-2]

Is fgh ~ jkl? if so, identify the similarity postulate or theorem that applies.

In a sale there is 25% of all prices a chair costs £45 in sale how much was it before the sale

Alistair has 5 half-pounds chocalate bars. it takes 1 1/2 pounds of chocalate,broken into chunks, to make a batch of cookies. how many batches can alistair mke with chocalate he has on his hand?