Question

plzzz sove it ,,its urgent

Answer 1

Q 73
Option C is correct
Take the time as 8 hours 48 minutes = 528 minutes
Time of 4 hours = 240 minutes
Take the minutes ratio as 528:240. i.e, 11:5 then
x+y=11 and
x-y=5
Solve, x=8, y=3
ratio 8:3

Q 74
Option B is correct 18 cm
Ratio of perimeter and breadth = 5 ratio 1
Perimeter/breadth = 5/1
2(l+b)/b = 5/1
2l + 2b = 5b
2l = 3b
2/3l = b
Area = 216 sq. cm
> l x b = 216 => l x (2/3)l =216

l = 18 cm.

Q75
Option D is correct 4.04
Let assume that side of square is 100 cm

100 cm is read as 102 cm.

A1 = (100 x 100) and A2 =(102 x 102)

(A2 - A1) = [(102 * 102)-(100*100) ]= 404

Percentage error =[404/(100*100 )] x 100%= 4.04%