Question

Find the perfect cube of the following number through estimation 1)10648 2)15525 3)110592 4)91125

Answer 1

Answer:

Step-by-step explanation:

10648

end with 8

hence unit digit of cube root should be 2

27000 > 10648   > 8000

=> 30000 > ∛10648  >  20

greater than 20  and less than 30 ending with digit 2

so ∛10648  = 22

15625

end with 5

hence unit digit of cube root should be 5

27000 > 15625  > 8000

=>   30 > ∛15625 >  20

greater than 20  and less than 30 ending with digit 5

∛15625  = 25

Similarly

∛110592  = 48

∛91125  = 45

Answer 2

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