Let original length = x and original breadth = y. Decrease in area = xy - (80*90xy) /(100*100)
= xy - 18xy/25 = 7 xy/25
Decrease % = 7 xy/25 * 1 * 100 % = 28%
Q. No. :
3
Question :
A monkey starts climbing up a tree 20ft. tall. Each hour, it hops 3ft. and slips back 2ft. How much time would it take the monkey to reach the top?
A :
15
B :
20
C :
21
D :
18
Answer: D
Q. No. :
4
Question :
x, y, z are distinct integers such as x is positive, y is lesser than x and z is more than x and y. Then which of the following is true ?
A :
x y³
B :
x-y > 0
C :
xyz>0
D :
none of these
Answer: B
Q. No. :
5
Question :
Train X starts from A towards B which is 180 Kms apart. At same time, train Y start from B towards A. Train X travels at speed of 70 kmph and Y travels at 50 kmph. While X does not stop anywhere on the way, the train Y stops at station C in between at 60km from B for 15 minutes. At what distance from A they would meet
Let the meet at a distance x km from A.
So x/70 = (180-x)/50 + 1/4
or, 100x/70 = 360-2x+25
or, 10x = 2520 - 14x + 175
or, 24x = 2695
or, x = 2695/24 = 112.3km
Q. No. :
6
Question :
Find the output for the following C program
int i =10
main() { int i =20,n;
for(n=0;n<=i;)
{ int i=10;
i++;
}
printf("%d", i); }