Question

Volume of 2 spheres are in the ratio 64:27.find their radii if the sum of their radii 21cm.20.3cubes of metal whose edges are in the ratio 3:4:5 are melted down into a single cube whose diagonal is 1/4cm.find the edges of thee three cubes.

Answer 1

Answer:

1) 9 cm , 12cm

Step-by-step explanation:

1) if volume s are 64:27

then there radii are = 4:3

sum of radii =21

sum of ratios = 3+4 =7

first radius =( 3/7)×21 = 9cm

second radius = (4/7)×21 =12 cm