Question

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square.
Q.No 9. Find the cube root of 857375 using estimation technique.​

Answer 1

step by step explanation :

1.make group of 3 digit ,starting from right

857 375

second first

group group

2. the unit digit of cube root will be unit digit of cube root of 857375 = unit digit of cube root of 375 .since 375 ends in 5.

:. unit digit of cube root will be 5

3. now for second group 857

we note that 9cube = 729

and 10 cube is 1000

so,729 <857 <1000

9 cube <857 <10 cube

so,we take small no. 9

we put 9in tens place of cube root

hence the cube root is 95

therefore 95 is the cube root of 857375

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