Question

a rectangle price of plastic sheet measure 1 m by 70 cm find its cost rupees 80 per square metre

Answer 1

Heya!!

Rectangle's length = 100 cm

Its breadth = 70 cm

Area = length × breadth

= 100 × 70

= 7000 cm^2

= 0.7 m^2

Now,

Cost for 1 m^2 = 80

=) cost for 0.7 m^2 = 80 × 0.7 = Rs 56

Hence, total cost is Rs 56.

Hope it helps uh.

Answer 2

Step-by-step explanation:

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Given :-

Baichung’s father is 26 years younger than Baichung’s grandfather and 29 years older than Baichung. The sum of the ages of all the three is 135 years.

To Find :-

Age of each

Solution :-

Let the age of Baichung be B

Age of father = B + 26

Age of grandfather = B + 26 + 29

Age of grandfather = B + 55

Now

(B) + (B + 26) + (B + 55) = 135

3B + 81 = 135

3B = 135 - 81

3B = 54

B = 54/3

B = 18

Now

Age of Baichung = 18 years

Age of his father = 18 + 26 = 44 years

Age of grandfather = 18 + 55 = 73 years