Q. Solve the following questions mentally:
is
a) Find the ratio of 4km to 60m
b) Base and height of a triangle is 9cm. Calculate its area.
c) Find the circumference of a circle having diameter 100 meters.
d) Subtract 3a from 4a - 3b
e) The perimeter of a rectangle and a square are equal. If the dimensions of the rectangle are 3cm x 5cm,
find the area of the square.
f) Find the value of : + =
g) The salary of a worker is increased by 25%. If his original salary is Rs.5000, then the increment in salary
and the new salary is
h) Round off 58263 to 1 significant figure.
i) The sum of three consecutive numbers is 21. Find the numbers.
j) Express as a percentage.
k) Which of the following are prime numbers?
9, 17, 23, 91, 59
1) Which is greater: ora?
m) Find speed when distance is 142 km and time taken is 2
hours.
n) Find the value of x in the given figure.
7
60°
o) Find the perimeter of an equilateral triangle with side 7cm.
120°
Answers
Answered by
3
Answer:
a.4000/60
66.6 :1
b.40.5 cm^2
c.22/7 × 100
314.8 cm
d.a -3b
o.21cm
IT WI LL DEFINETLY HELP U
Similar questions