Perimeter of a rectangle is found by using the formula P = 2 ( l + w),
where l and w are respectively the length and breadth of the
rectangle. Write the rule that is expressed by this formula in words.
Perimeter of a triangle is found by using the formula P = a + b + c,
where a, b and c are the sides of the triangle. Write the rule that is
expressed by this formula in words.
In a village, there are 8 water tanks to collect rain water. On a
particular day, x litres of rain water is collected per tank. If 100 litres
of water was already there in one of the tanks, what is the total
amount of water in the tanks on that day?
A class with p students has planned a picnic. Rs 50 per student is
collected, out of which Rs 1800 is paid in advance for transport. How
much money is left with them to spend on other items?
Translate each of the following statements into an equation:
(a) The perimeter (p) of an equilateral triangle is three times of itsside (a).
(b) The diameter (d) of a circle is twice its radius (r).
(c) The selling price (s) of an item is equal to the sum of the costprice (c) of an item and the profit (p) earned.
(d) Amount (a) is equal to the sum of principal (p) and interest (i).
What is the significance of atrio-ventricular node and atrio-ventricular bundle in the functioning of heart?
Translate each of the following statements into an equation, using x
as the variable:
(a) 13 subtracted from twice a number gives 3.
(b) One fifth of a number is 5 less than that number.
(c) Two-third of number is 12.
(d) 9 added to twice a number gives 13.
(e) 1 subtracted from one-third of a number gives 1.
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