Question

Last year a tree was about 2.6 m high since then it has increased 20%
a)How much has the tree grown up?
b)the height of the tree now

Answer 1

Answer:

Correct option is

D

81 cm

Let the original height of the tree=x cm.

We know that

final height=original height×(1+rate)

time

Here the rate is

8

1

, time=2yrs, original height=64cm.

Then the height after 2yrs.=64×(1+

8

1

)cm

2

=

64

64×81

cm

=81cm