Find the whole quantity if
(a) 5% of it is 600 (b) 12% of it is ₹1080 (c) 40% of it is 500 km
(d) 70% of it is 14 minutes (e) 8% of it is 40 litres
Solution:
(a) 5% of it is 600
Assume the whole quantity to be A.
We know that, 5% = 5/100
Since, 5% of it is 600
So, 5/100 × A = 600
A = 600 × 100/5
= 12000
(b) 12% of it is ₹1080.
Assume the total amount to be A.
Since 12% of A is ₹1080.
So,12/100 × A = 1080
A = 1080 × 100/12
= ₹ 9000
(c) 40% of it is 500 km.
Assume total distance to be A.
Since 40% of A is 500 km.
So, 40/100 × A = 500
A = 500 × 100/40
= 1250 km
(d) 70% of it is 14 minutes.
Assume total time to be A.
Since 70% of it is 14 minutes.
So, 70/100 × A = 14
A = 14 × 100/70
= 20 minutes
(e) 8% of it is 40 litres.
Assume the total amount to be A.
Since 8% of A is 40 litres
So, 8/100 × A = 40
A = 40 × 100/8
= 500 litres
☛ Check: NCERT Solutions Class 7 Maths Chapter 8
Video Solution:
Find the whole quantity if (a) 5% of it is 600. (b) 12% of it is ₹1080. (c) 40% of it is 500 km. (d) 70% of it is 14 minutes. (e) 8% of it is 40 litres.
Class 7 Maths NCERT Solutions Chapter 8 Exercise 8.2 Question 5
Summary:
The value of the whole quantities of the following (a) 5% of it is 600. (b) 12% of it is Rs 1080. (c) 40% of it is 500 km. (d) 70% of it is 14 minutes. (e) 8% of it is 40 litres are a) 12000, b) ₹ 9000, c) 1250 km, d) 20 minutes, and e) 500 litres respectively.
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