self
Maths Puzzle
A screwdriver and a hammer currently have the same price. If the price of a screwdriver rises by 5% and price of the hammer goes down by 3%, how much more will it cost to buy 3 screwdrivers and 3 hammers?
a. 3%
b. 4%
c 5%
d. 8%
Read Solution (Total 4)
-
- 1% which is none of given options.
If initial price of 3 screwdrivers = initial price of 3 hammers = Rs 100.
Final price of 3 screwdrivers Rs 105.
Final price of 3 hammers = Rs 97.
Final price of 3 screwdrivers and 3 hammers = Rs 202
Initial price of 3 screwdrivers and 3 hammers = Rs 200
% increase in price of 3 screwdrivers and 3 hammers = 100*2/200= 1% - 11 years agoHelpfull: Yes(4) No(0)
- let initial price of screwdriver and hammer is 100.
after changing in prices
screwdriver =105 and hammer=97
for 1 hammer and 1 driver before changing prices total cost=200
after changing prices total cost=202
then %change is 1% (for 1 hammer and 1 driver)
therfore,for 3 hammer and 3 drivers it will be 3%. - 11 years agoHelpfull: Yes(1) No(0)
- let the initial price of a screwdriver and a hammer be rs 100 each .
then,
3SD +3H = 600
according to the question ,
5% increased for SD and 3% increased for H
3SD+3H = 624
required percentage = 24/600* 100
= 4% .. - 8 years agoHelpfull: Yes(0) No(0)
- let the initial price of a screwdriver and a hammer be rs 100 each .
then,
3SD +3H = 600
according to the question ,
5% increased for SD and 3% decreased for H
3SD+3H = 3*105 + 3*97
required percentage = 6/600* 100
= 1% - 7 years agoHelpfull: Yes(0) No(0)
self Other Question
Two Trians one from Howrah to Patna and other from Patna to Howrah starts simultaneously. after they meet the trains reach their destinations after 9 hours and 16 hours respectively. The ratio of their speeds is ?
a) 2:3
b) 4:3
c) 6:7
d) 9:16
what will be the next term in the following series?
a) 3 , 3, 4, 8, 10, 36, ?
b) 25, 26, 25, 26, 27, 28, ?
c) 18, 20, 22, 20, 28, 20, ?
d) 7, 6, 8, 5, 3, 7, ?
Please give the solution with explanation