Question

C. Long Answer Questions.
1. Solve the following system of linear equations graphically and shade the region
between the two lines and x-axis.
(0) 3x + 2y + 4 = 0
3x + 2y - 11 = 0
2x - 3y - 7 = 0
2x - 3y + 10 = 0
2. Solve graphically the system of linear equations:
4x - 3y + 4 = 0
4x + 3y - 20 = 0
Find the area bounded by these lines and y-axis.
3.
4.
5.
Susan invested certain amount of money in two schemes A and B, which offer
interest at the rate of 8% per annum and 9% per annum respectively. She received
Rs. 1860 as annual interest. However, had she interchanged the amount of
investment in the two schemes, she would have received Rs. 20 more as annual
interest. How much money did she invest in each scheme?
A two digit number is 4 times the sum of its digits and twice the product of the digits.
Find the number.
A person, rowing at the rate of 5 km/h in still water, takes thrice as much time in
going 40 km upstream as in going 40 km downstream. Find the speed of the stream.
A motor boat can travel 30 km upstream and 28 km downstream in 7 hours. It can
travel 21 km upstream and return in 5 hours. Find the speed of the boat in still water
and the speed of the stream.
A two-digit number is obtained by either multiplying the sum of the digits by 8 and
then subtracting 5 or by multiplying the difference of the digits by 16 and then
adding 3 Find the number
6.
7.​

Answer 1

Step-by-step explanation:

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