20 packs contain 4 B’s
The probability that 1 pack will have a B is 420 or 15.
log_{a} (0.0196) = 2
0.0196 = a_{2}
19610000⁄ = a_{2}
√19610000⁄ = a
a = 14100 = 0.14
140 part cool by first AC in 1 minute
145 part cool by second AC in 1 minute
17360 = 140 + 145 = part cool by both AC in 1 minute.
Total time = 36017 = 21.2 ≈ About 22 minutes
Let Principal be Rs. X
Amount = Rs. 10x
S.I. = (A - P) Rs. 9x
S. I. = P∗R∗T100⁄
9x = x∗R∗20100⁄
R = 45%
0.5 kg flour can make 5 cup cakes i.e. one cup cake can be made using 100 gm of flour.
4.2 kg or 4200 gm flour can make (4200100?) = 42 cup cakes.