Question

three solid cubes of edges 21 cm, 35 cm and x cm are melted to form a single cube of Edge 42 cm, find the value of x


please answer very important​

Answer 1

Answer:

According to the given condition

⇒ 21³ + 35³ + x³ = 42³  

⇒ x³ = 74088 - 441 - 1225 = 72422

⇒ x = 41.7 cm