Question

(2)
ii) The power of each variable in the L.C.M should be highest power of
the variable present in the given expressions.
iii) 20% of 30 = 30% of 20.
4. Answer any two:
5x2=10
Due to increase in cost of sugar by 10% a person decreases the sugar
consumption by 10%. By what percent his expenditure on sugar is
decreased or increased?
ii) In two types of drink the ratio of syrup and water is 2:7 and 1:5
respectively. What will be the ratio of syrup and water if 27 litre of
the first drink is mixed with 18 litre of the second drink?
iii) Ashwin and Amlan can do a work separately in 20 days and 30 days
respectively. After working for 7 days together both of them left the
work. Rohit came and completed the rest of work in 10 days. Calculate
how many days Rohit will take to complete the whole work. Find also
in how many days work will be completed if Ashwin, Amlan and Rohit
would work together.
5
5.
400
1
8
Distance covered
50
150
250
by a car (in km)
Time taken (in hour)
3
5
Express graphically the given data.
From graph determine
How much distance did the car cover in 2 hours?
1)
How much time will the car take to cover 350 km?
5
4x2=8
D)
6. Factorise (any two):
(x + 1)(x + 3)(x-4) (X - 6) + 24
ii) xy6 - 9x3y3 + 8
ii) ax2 + (a2 + 1)X + a
7. Find the G.C.D of the following algebraic expressions
(a2 + 2a)2, 223 + 3a2 - 2a, 2a4 - 393 – 14a2​

Answer 1

Answer:

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