Answer:
£210
Step-by-step explanation:
A decrease of 30% represents 70% of the original cost.
100% represents the original cost
Divide the price by 70 to find 1% then multiply by 100 for original cost
original cost =
× 100 = 2.1 × 100 = £210
Answer:
0.002 BTUs per cubic foot heat is produced per hour
Step-by-step explanation:
Given:
Number of person = 2
Amount of heat produced by one person = 2.400 BTU
Dimension of the room = 20 ft x 12 ft x 10 ft
To Find:
How many BTUs per cubic foot do they produce in 1 hour = ?
Solution:
E =
Substituting the values
E = 
E = 
E = 0.002 BTU per cubic feet