Apile of sand has a weight of 90kg. the sand is put into a small bag, a medium bag and a large bag in the ratio 2 : 3: 7 work out the weight of sand in each bag. small bag: medium bag: large bag:

Add the ratios to find the total shares:

2 + 3 +7 = 12

Divide the total weight by the number of shares:

90 kg/ 12 =7.5 kg per share.

Now multiple each share by the weight per share:

Small = 2 x 7.5 = 15 kg

Medium = 3 x 7.5 = 22.5 kg

Large = 7 x 7.5 = 52.5 kg

the radius is 2 times the diameter.

step-by-step explanation: