Question

1)
Circumference of fore wheel of a car is
27 m and circumference of rear wheel
is 3 * m. If fore wheel makes 10 revolu-
tions more than rear wheel. What will
be distance covered by car ?
(1) 40 (2) 80 X (3) 60 (4) 70 %​

Answer 1

Answer:

fore whel makes to rordution more than are wheel distance converted =120 m

Let rd1 be diameter of five wheel and rd2 be diameter of area wheel then

πd1

120

=

πd2

120

+10......(1)

later diameter of five wheel is increased by 1/4

π(

4

5

d1)

120

=

πd2

120

+6

⇒

πd1

96

=

πd2

120

+6........(2)

substitude (1) in (2)

⇒

πd1

96

=

πd1

120

−10+6

⇒

πd1

120

−

πd1

96

=4

⇒ πd1=6 circumference of for wheel

Substuting πd1 in (3)

we get πd2=12 rase wheel.