If a man travels 160 km by car at the speed of 64 km/h and a
If a man travels 160 km by car at the speed of 64 km/h and another 160 km at the speed of 80 km/h, the average speed for the whole journey is
If a man travels 160 km by car at the speed of 64 km/h and another 160 km at the speed of 80 km/h, the average speed for the whole journey is
Nithin K ? Dec 3 '2016 at 19:26
Answer : 71.11
Explanation:
Formula:
\(Time = \frac{Distance}{speed} \)
\(\text{total time taken = (times taken for first 160km + times taken for next 160km)}\)
\(\text{total time taken }= \big(\frac{160}{64} + \frac{160}{80}\big)\)\(=\frac{9}{2}\text{ hours }\)
\(\text{Time taken for 320 Km = 320 }\times \text{29=71.11km/hr}\)
The length of a rectangle is decreased by 10% and its breadth is increased by 10%. By what percent is its area changed?
Nithin K ? Dec 2 '2016 at 23:57
Answer is : 1%
Explanation:
When there is an increase in sides of a figure, the net increase in its area is
\(= x+y+\frac{xy}{100} \%\)
where x and y are length and breadth
given, length x decreased by 10. so, x = -10.
breadth y increased by 10. so, y = 10.
percent is its area changed
\(= -10 + 10 + \frac{-10 \times10}{100}\% = -1 \%\)\(\therefore \text{ percent of area decresed by 1%}\)
Successive discounts of 10% and 20% are equivalent to a single discount of
Nithin K ? Dec 2 '2016 at 22:21
Answer is : 28%
Explanation:
Let marked price be 100.
apply 10% discount
\(\frac{10}{100}*100=10 \) ......(i)
apply 20% discount
\(\frac{20}{100}*90=18 \) .......(ii)Total discounts = (i) + (ii)
=10+18
=28
discount percentage=\(\frac{28}{100}*100\)=28%
In a certain code, GARIMA is written as 725432 and TINA as 6482. How is MARTINA written in that code?
Nithin K ? Dec 2 '2016 at 22:12
Answer: 3256482
Explanation:
The alphabets are coded as shown below :
G A R I M T N 7 2 5 4 3 6 8 So, M is coded as 3,
A as 2,
R as 5,
T as 6,
I as 4, and
N as 8.
Thus, MARTINA is coded as 3256482.
If SHARP is coded as 58034 and PUSH as 4658, then RUSH is coded as
Nithin K ? Dec 2 '2016 at 22:6
Answer is : 3658
Explanation:
The alphabets are coded as follows :
S H A R P U 5 8 0 3 4 6 So, the code for RUSH is 3658.
If the letters of PRABA are coded as 27595, and THILAK as 368451, how will BHARATHI be coded?
Nithin K ? Dec 2 '2016 at 20:56
Answer is : 96575368
Explanation:
The alphabets are soded as shown :
P R A B T H I L K 2 7 5 9 3 6 8 4 1 So, B is coded as 9,
H as 6,
A as 5,
R as 7,
T as 3 and
I as 8.
Thus, the code for BHARATHI is 96575368.