Advertisements
Advertisements
Question
Find the reciprocal ratio of `x/3 : y/7`
Advertisements
Solution
Reciprocal ratio of `x/3 : y/7`
= `1/(x/3) : 1/(y/7)`
= `3/x : 7/y`
= `(3/x)/(7/y)`
= `(3y)/(7x)`
= 3y : 7x
APPEARS IN
RELATED QUESTIONS
If a: b with a ≠ b is the duplicate ratio of a + c: b + c, show that c2 = ab.
Find the ratio of the first quantity to the second.
1 litre, 250 ml
Snehal has a red ribbon that is 80 cm long and a blue ribbon, 2.20 m long. What is the ratio of the length of the red ribbon to that of the blue ribbon?
Choose the correct answer from the given options :
The ratio of 4 litres to 900 mL is
The length and breadth of a window are in 1m and 70 cm respectively. The ratio of the length to the breadth is _______________
There are ‘b’ boys and ‘g’ girls in a class. The ratio of the number of boys to the total number of students in the class is ______.
Fill in the following blanks:
`15/18 = square/6 = 10/square = square/30`
[Are these equivalent ratios?]
Find the ratio of the following:
500 mL to 2 litres
Present age of father is 42 years and that of his son is 14 years. Find the ratio of present age of father to the present age of son.
A doctor reports blood pressure in millimeters of mercury (mm Hg) as a ratio of systolic blood pressure to diastolic blood pressure (such as 140 over 80). Systolic pressure is measured when the heart beats, and diastolic pressure is measured when it rests. Refer to the table of blood pressure ranges for adults.
| Blood Pressure Ranges | |||
| Normal | Prehypertension | Hypertension (Very High) |
|
| Systolic | Under 120 mm Hg | 120-139 mm Hg | 140 mm Hg and above |
| Diastolic | Under 80 mm Hg | 80-89 mm Hg | 90 mm Hg and above |
Manohar is a healthy 37 years old man whose blood pressure is in the normal category.
- Calculate an approximate ratio of systolic to diastolic blood pressures in the normal range.
- If Manohar’s systolic blood pressure is 102 mm Hg, use the ratio from part (a) to predict his diastolic blood pressure.
- Calculate the ratio of average systolic to average diastolic blood pressure in the prehypertension category.
