Explanation

To solve this, we need to follow the order of operations (PEMDAS):

Multiply 6 and 20: 6 × 20 = 120

Divide 120 by 4: 120 ÷ 4 = 30

Subtract 40 from 10: 10 - 40 = -30

Add 30 to -30: -30 + 30 = 0

Explanation

21^2=21×21=441

Explanation

Add the middle with the smallest and then divide by the third number (2, 14, 4).

14: Middle number 

2: smallest number 

4: third number 

14 + 2 = 16 

16/4 = 4

Explanation

= √(25^-1)÷ √(100^-1)

=(0.2)/(0.1)

= 2

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ND17-1-2023

Explanation

*****

 ND1-1-2023

Explanation

1083+84= 1167

******

RY 31-12-2022

Explanation

Explanation

69^2=4761

Explanation

According to the order of operations (PEMDAS),

multiplication is done before addition,

3 x 4 = 12

7 + 12 = 19

Explanation

Let Speed of the man is x kmph.

Distance covered in 10 minutes at 20 kmph = distance covered in 8 minutes at (20 + x) kmph.

Or, 20×1060=860×(20+x)

Or, 200 = 160 + 8x

Or, 8x = 40

Hence, x = 5kmph