Directions (next five questions) : In each of the following questions, two equations are given. Solve these equations and
I. x2+20 = 9x
II. y2+42=13y
x2-9x+20=0
(x-4)(x-5)=0
x=4,5
y2-13y+42=0
(y-6)(y-7)=0
y=6,7
x
I. x2+5x+6=0
II. y2+7y+12=0
Manish bought 25 kg of rice at INR 32 per kg and 15 kg of rice at INR 36 per kg. What profit did he get when he mixed the two varieties together and sold it at INR 40.20 per kg
Farah was married 8 years ago. Today her age is 1 2/7 times to that at the time of marriage. At present her daughter’s age is 1/6th of her age. What was her daughter’s age 3 years ago
A horse is tothered to a peg with a 14 m long rope at the corner of a 40 m long and 24 m wide rectangular grass-field. What area of the field will the horse graze
From a well-shuffled pack of 52 playing cards, one card is drawn at random. What is the probability that the card drawn will be a black king