Question

Plz prove it ....


No unwanted answer ✖️✖️✖️


urgent !!!!


Do both questions .
.

Answer 1

86):-

work completed by 20 men=30 days,

then
work completed by 1 man=30×20=600 days,

hence
work completed by 25 men = 600/25=24 days,



87):-

x^1999 is divided by x²-1,

for remainder
x²-1=0,

x²=1,

x^(2×999+1),


(x²)^999 × x,

then it becomes,

(1²)^999 × x,


1 × x,

x

Answer 2

Hey user

Here is your answer :-

__________________________________

Q.86

20 men takes 30 days to complete the work .

As the no. of men increases the no. of days decreases

Hence it is inverse proportion .

So product remains constant.

Let the no. of days be x

20 × 30 = 25 × x

600/25 = x

x = 24

So 25 men takes 24 days to complete the same work.

Q.87

In attachment