If a man swims 4 miles upstream at 1 mph and back downstream to the same point at 4 mph, what is his average speed?
A
0.8 mph
B
1.6 mph
C
2.4 mph
D
3.2 mph
উত্তরের বিবরণ
প্রশ্ন: If a man swims 4 miles upstream at 1 mph and back downstream to the same point at 4 mph, what is his average speed?
সমাধান:
1 mph এ 4 miles যায় 4 ঘণ্টায়
4 mph এ 4 miles যায় 1 ঘণ্টায়
∴ 5 ঘণ্টায়যায় 8 miles
∴1 ঘণ্টায় যায় (8/5) miles = 1.6 miles
So,the average speed is 1.6mph
0
Updated: 1 month ago
If you count from 1 to 100, how many 5s will you pass on the way?
Created: 1 month ago
A
20
B
11
C
18
D
19
প্রশ্ন: If you count from 1 to 100, how many 5s will you pass on the way?
সমাধান:
The numbers are: 5, 15, 25, 35, 45, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 65, 75, 85, 95
From 1 to 100 there is 20 5s.
0
Updated: 1 month ago
Divide 30 by half and add 10. What do you get?
Created: 1 month ago
A
25
B
45
C
55
D
70
প্রশ্ন: Divide 30 by half and add 10. What do you get?
সমাধান:
30/0.5 + 10
= 60 + 10
= 70
0
Updated: 1 month ago
The fifth consonant from the beginning of this sentence is the letter-
Created: 1 month ago
A
i
B
e
C
a
D
t
প্রশ্ন: The fifth consonant from the beginning of this sentence is the letter-
সমাধান:
Consonants from the beginning of the sentence are T, h, f, f, t, h.
So “t” is the fifth consonant.
0
Updated: 1 month ago
