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### Question

One-half of the cube-root of which number is 0.3?

**A**

0.216.

**B**

0.256.

**C**

0.128.

**D**

0.144.

**Soln.**

**Ans: a**

Let the number be n. So ${1/2} × √^3n$ = 0.3, which gives $√^3n$ = 2 × 0.3 = 0.6. so n = $0.6^3$ = 0.216.