Question

Ram’s height is 20 cm more than Priya’s height. Priya’s height is 30 less than Ronak’s height. Ronak’s height is 120 cm. Find the average height of Ram and Ronak?(in cm)
1. 110
2. 115
3. 120
4. 130

Answer 1

Correct Answer - Option 2 : 115

Given:

Ram’s height = Priya’s height + 20 cm

Priya’s height = Ronak’s height - 30 cm

Ronak’s height = 120 cm

Concept:

Average height = Total height/Total persons

Solution:

Ronak’s height = 120 cm

Priya’s height = Ronak’s height - 30 cm

⇒ 120 - 30

⇒ 90 cm

Ram’s height = Priya’s height + 20 cm

⇒ 90 + 20

⇒ 110 cm

Average height of Ram and Ronak = (110 + 120)/2

⇒ 230/2

⇒ 115 cm