Question

9 (112) – ?
1.16 (1/8) 2.16 (5/8) 3.8 (3/8) 4.8 (7/8) 5. None of these
51. The cost of 15 blankets and 6 pillows is Rs. 7470 and the cost of 9 blankets and 2 pillows is Rs.
4290. Find the difference between the cost of a blanket and the cost of a pillow.
1. Rs. 330
2.Rs. 450 3.Rs. 122 4.Rs. 250 5.Rs. 390
52. In a hockey team of Il miris annale​

Answer 1

Answer:

let number of blankets=x

number of pillows=y

case-1

There are 15 blankets and 6 pillows

so,15x+6y=7470(equation 1)

case-2

There are 9 blankets and 2 pillows

so,9x+2y=4290(equation 2)

15x+6y=7470

9x+2y=4290

Do for these two eqiations elimination method

Then you will get

135x+54y=67230

135x+30y=64350

Then 24y=2880

y=2880/24

y=120

next substitute y value in any one of the equation

135x+30y=64350

135x+30(120)=64350

135x+3600=64350

135x=64350-3600

135x=60760

x=60760/135

x=450

Now do the required calculate difference a single blanket and a single pillow

=450-120

=330

So option a(330) is correct