Question

The height of two plants is in the ratio 7 : 9. The height if the taller plant is 26cm more than the height of the shorter plant. [3]

a) What is the height of taller plant?
b) What is the height of shorter plant?
c) What is their total length?

Answer 1

• 117 cm; 91 cm; 208 cm

Explanation:

According to the given ratio the height of the plants is 7x and 9x.

The difference of heights is 26 cm:

• 9x - 7x = 26
• 2x = 26
• x = 13

a) The taller plant is:

• 13*9 = 117 cm

b) Shorter plant is:

• 7*13 = 91 cm

c) Their total height is:

• 117 + 91 = 208 cm