Question

() The equations 2x+1=3 and 5x-2-8 have the same solution.
(ii) If p:q::m:n, then pn = qm.
(iv) If two rectangles have equal perimeters then they must have equal areas.
(v) The perimeter of rectangle with length of 3m25cm and breadth of 2m50cm is 11m50cm.
Q3. Fill in the blanks --
(1 X 5 = 5)
0 4th part of 40 is
(i) X multiplied by 10 and then the product is subtracted from 50 is expressed as
(iii) If the cost of 6 cans of juice is Rs. 21, then the cost of 4 cans of juice is
(iv) The perimeter of an equilateral triangle of side 15cm is
(v)
is the variable in equation 3n = 21.
Q4. Solve the following questions :-
(2 X 2 = 4)
(0) A rectangular box has height h cm. Its length is 2 cm less than 3 times the height and breadth is
5 cm more than the length. Express length and breadth of box in terms of the height.
() A car travels 90 km in 2 1/2 hours.
(a) How much time is required to cover 30 km with the same speed?
(b) Find the distance covered in 2 hours with the same speed.
Q5. Solve the following questions:
(3 X 2 = 6)
( Bob wants to cover the floor of a room 3 m wide and 4 m long by squared tiles. If each square tile
is of side 0.5 m, then find the number of tiles required to cover the floor of the room.
(ii) If length and breadth of a rectangular field are 30 m and 15 m respectively
(a) Find the ratio of length to breadth of the field.
(b) Find the ratio of length to perimeter of the field.
(c) Find the ratio of breadth to perimeter of the field.​

Answer 1

Answer:

Neurons (also called neurones or nerve cells) are the fundamental units of the brain and nervous system, the cells responsible for receiving sensory input from the external world, for sending motor commands to our muscles, and for transforming and relaying the electrical signals at every step in between.Aug 13, 2019