Can someone me answer the bottom 2 questions? show working ! asap 20

The ratio is 1:3:5

and he wants to make 180 kg

Total number of parts  is 1+3+5 = 9

so 1/9 of the 180 kg  has to be cement which = 1/9 * 180 = 20 kg

But he only has 15kg so he can't make 180 kg of the concrete mix.

(Though he has enough sand and gravel)

Second question

Total value of  5p coins might be = 2*5 = 10p

Total values of 10p coins might be 3*10 = 30b

So the ratio of the values is 10: 30  = 1:3  (answer)

ege

step-by-step explanation:

egge